Mr Green's evidence
354 Mr Dennis Green gave evidence and produced an expert report. Before his retirement in July 2014, Mr Green had been employed as the operations-livestock manager with Altona Hatchery. Mr Green had commenced employment with Altona Hatchery in October 2000. Prior to that period, Mr Green had more than 20 years experience in managing broiler breeder farms. From 2009 until 2011, Mr Green served on a number of consultative committees for quality assurance programmes for the Australian Egg Corporation Limited, which is an industry body for egg producers.
355 Altona Hatchery supplied the majority of day old commercial laying stock in Western Australia. In his role as operations-livestock manager at Altona Hatchery, Mr Green visited egg production farms all over Western Australia. He said that when he was at Altona Hatchery, he visited eleven free range farms - 10 in Western Australia and one in South Australia.
356 From November 2011, Snowdale was one of Altona Hatchery's biggest customers. Mr Cocking had stipulated that Mr Green was to be the person he dealt with as a condition for buying chicks from Altona Hatchery. In that capacity, Mr Green visited the Swan Valley and Carabooda farms on a number of occasions during November 2011 to December 2013.
357 In his affidavit, Mr Green said that he had visited the Swan Valley farm on about 12 occasions between November 2011 and December 2013. Mr Green said that on about six of his visits to the Swan Valley farm, he just visited the office which was in the front of the property to discuss the planning of orders and any industry news. The other six visits he looked inside the "various sheds" on the property to see how things were running. He did not recall ever going to or seeing much of the area outside of the free range shed. He said from inside of the free range shed, he saw chickens were going to the outside area through the pop holes. He said that he could see they were able to leave the shed and come back in freely. He said that he could not say how many chickens were in the outside area. However, he said that if he had to estimate, he would say about 40% to 50% of the several thousand chickens were outside.
358 Mr Green said that, in his experience, chickens go inside or outside the shed depending upon the weather. He said that if it was raining, chickens, like humans, tended to stay indoors.
359 Mr Green said that he visited the Carabooda farm about 20 to 30 times during the period November 2011 to December 2013. Mr Green went to the Carabooda farm when the day old chicks were delivered there. Mr Green said that on his first three or four visits to the Carabooda farm, Mr Cocking had two sheds on the property for the rearing of the day old chicks. Mr Green said that during his visits he would often walk down the left-hand side of the property to see how things were going and, on occasions, Mr Groot would ask him to check the sheds and chickens. Mr Green said he never saw chickens confined to sheds in the free range production sheds. The chickens were always wandering outside and going in and out of the sheds through the pop holes. He said they were outside picking at the ground and doing what he called "dust bathing" which is rubbing around in the dust. The sheds' pop holes were always open.
360 Mr Green said that for the purposes of preparing the report he inspected the Carabooda farm on 9 February 2015 between 7:30 am and 12 noon, but by then free range operations had ceased at the Carabooda farm.
361 In his report, Mr Green addressed eight questions.
362 The first question was, what influence, if any, did the manner and conditions in which laying hens were reared and trained at both Carabooda and Swan Valley have in a:
(a) behavioural sense; and
(b) physical sense
on the likelihood of laying hens exiting the barns and moving around freely on the adjacent range.
363 Mr Green said that, in his opinion, the keeping of pullets in the rearing sheds at the Carabooda farm until the ages of 14 weeks to 17 weeks and their transfer to the laying sheds where they were kept inside for a further four weeks to six weeks, would not have affected the likelihood of them, once the pop holes were open, exiting the shed and moving about on the ranges. He said that the conditions of being raised in a shed would not have influenced their natural curiosity.
364 The second question was about the influence of the stocking densities inside the sheds at both Carabooda and Swan Valley on the matters mentioned at (a) and (b) in the first question (which I will refer to as the "prescribed questions"). Mr Green was asked to assume that the sheds had been stocked in accordance with the stocking density provided for in the Model Code.
365 Mr Green said that, in his opinion, sheds that have stocking densities in accordance with the non-caged system requirements of the Model Code did not adversely affect the behaviour or physical ability of laying hens to exit those sheds.
366 Mr Green said that the Model Code provided for a stocking density which equated to approximately 15.4 hens per square metre for fully matured laying hens (being approximately 40 weeks of age). Mr Green went on to say that based on his observations, during approximately 13 years working in the commercial egg industry, a density of approximately 15 laying hens per square metre provided sufficient space for laying hens freedom of movement within the shed and freedom to move their wings. Freedom of movement, said Mr Green, within the shed allows a hen to locate and move to a pop hole. Mr Green said that from his own observations of the sheds at Carabooda and the shed at Swan Valley, there was more than sufficient room for the laying hens to move about the sheds.
367 Mr Green said that overstocking, namely, in excess of the Model Code standard, can result in increased competition for food and water and result in uneven body weight throughout the flock. He said that in his observations, at the shed at Swan Valley and the sheds at Carabooda, he did not see this characteristic. He also said that the stocking densities he was instructed to assume would not influence the "natural curiosity of the laying hens". He stated that the number of hens he observed outside at Swan Valley, and his observations of hens using the pop holes at Carabooda, supported his view.
368 Mr Green was asked a third question which substituted the flock size for stocking density in relation to the prescribed questions. Mr Green was asked to assume that the flock sizes were the sizes pleaded by Snowdale in its defence, and, otherwise, that the flock sizes satisfied the stocking densities standard in the Model Code.
369 Mr Green said that based on his observations of laying hens exiting the laying sheds at both Swan Valley and Carabooda, he did not believe that flock size caused any adverse behavioural or physical effect on the ability of the hens to exit the laying sheds.
370 Mr Green said that his view was supported by his own observations on a free range farm located at Roseworthy Road, Roseworthy in South Australia. Mr Green said that he visited the Roseworthy farm approximately six times over a period of two years. He said that the sheds "were similar in many important aspects to the barns at Carabooda". Mr Green said that during this time he was able to observe firsthand that the hens of the farm were able and willing to exit the sheds. Mr Green said he observed what he estimated to be "between 70% and 90% of laying hens exiting the sheds regularly".
371 Question four related to the influence of the dimensions and interior contents of the sheds at Swan Valley and Carabooda, including the depth of the sheds, the distance the hens had to cover to exit the sheds, and the placement of the nest boxes and egg collection infrastructure had on the prescribed questions.
372 Mr Green said that at Carabooda and Swan Valley he observed that the laying sheds had, during the relevant period, conventional layouts which consisted of a single level nest system running along the centre of the sheds. Mr Green said that he was instructed that at Carabooda for the period when the pop holes were located on only one side of the sheds, and that there was a gap of approximately 7.2 m between the nest boxes and the end of the sheds. Mr Green said that, to the best of his recollection, there were gaps at each end of the Swan Valley shed which he believed were wider than the gaps at Carabooda. I add, in passing, that Snowdale never made good the assumption as to the size of the gap at Carabooda, referred to by Mr Green, nor his recollection in respect of the gaps at each end of the nest box structure at Swan Valley.
373 Mr Green said that the dimensions of the laying sheds and the nest box structures did not affect the physical capability of the hens or their willingness to exit a shed. However, the effect of having pop holes at only one side of the laying sheds would, he believed, have slowed the progress of hens exiting the sheds "to a degree which he was unable to quantify". He went on to say:
I have observed free range conventional barns at Sunrange Free Range Farm, Warbrook Road, Bullsbrook 6084, Bullsbrook Free Range Farm, Raphael Road, Bullsbrook, 6084 and Muchea Free Range Farm, Great Northern Highway, Muchea 6051, with pop holes only on one side of the barn, at which I have observed laying hens in large numbers exiting the barns.
Both the Sunrange Farm and the Muchea farm had gaps at the end of each shed for the birds to walk around. The Bullsbrook farm, to the best of my recollection, had approximately 4 ramps going over the nest boxes from the side where there were no pop holes to the other side.
374 Mr Green said that on past visits to the Carabooda farm, he observed hens in the range areas between sheds 5, 6, 7 and 8 on several occasions.
375 Mr Green said that, in his time in the poultry industry, he had observed hens going from one side of the shed to the other by going over the top of the nest boxes. He also said that he could not independently remember when the extra pop holes were put into the Carabooda sheds, but, to the best of his recollection, the number of hens he had seen on each visit was generally consistent.
376 The fifth and sixth questions related to the effect of the size, placement and use of physical openings to the open range on the prescribed questions.
377 The assumptions Mr Green was asked to make included the number and dimensions of the pop holes and the height from the ground that Snowdale had pleaded in its defence.
378 Mr Green said that the size of the pop holes and the distance to the ground at all times was adequate to allow free range of movement of laying hens to exit the sheds. He said that he based his opinion on his observations of the hens exiting the sheds at Carabooda and watching hens at the Roseworthy farm exiting the sheds. He said the hens at the Roseworthy farm exited with ease where the distance of the pop holes from the ground was about 900 mm.
379 The sixth question related to the influence of the distance between the pop holes and the ground on the prescribed questions. Mr Green referred to his previous answer.
380 The seventh question Mr Green was asked was what influence the requirement for the hens to "jump up" to access the pop holes, in order to get to the outdoor ranges, would have on the prescribed questions. Mr Green said that there was no need for the hens to "jump up" to access the outdoor ranges, as all of the pop holes were at floor level.
381 Question 8 asked what influence the physical appearance and condition of the outdoor range would have on the prescribed questions. Mr Green said that, from his observations and experience in the industry, chickens liked to scratch and dust bathe. Mr Green said that he had observed the laying hens engaging in those activities at Carabooda. He said he did not see them do that at Swan Valley because he did not go into, or spend time observing, the outdoor range. He also said that, from his experience, chickens liked to congregate near trees and shrubs in the shade. He said that, in his experience, heavy rain and excessive heat caused most laying hens to return inside the shed. He said that the outdoor ranges between sheds 5, 6, 7 and 8 at Carabooda were well shaded. He said the exception was the range at the north side of shed 8, which did not have trees or shrubs. He said that based on those matters, he concluded that the effect, if any, of the outdoor ranges was such that they were generally attractive to the laying hens.
382 During the cross-examination of Mr Dennis Green, senior counsel for the ACCC called for drafts of Mr Green's expert report. The drafts were produced. The documents which were produced showed that on Wednesday, 11 February 2015, Mr Green emailed to Snowdale's solicitors a first draft of an expert report for the purposes of discussion. The substance of that report was three and a half pages in length.
383 Mr Green sent a second draft report he had drafted on Thursday, 12 February 2015 at ll:22 am. The substance of that report was also about three and a half pages in length.
384 Then on 13 February 2015, a draft document which had been generated by Snowdale's solicitors, was sent to Mr Green. The substance of that document ran to almost nine pages. Thereafter, there were a further seven iterations of the draft report based on the draft report produced by Snowdale's solicitors until the final report was produced and filed.
385 The ACCC contended that an examination of the progression of drafts towards the production of the final report showed that Mr Green was amenable to making amendments which assisted Snowdale's case; and this undermined his claim to be an independent expert. Accordingly, the ACCC contended that Mr Green's evidence should be accorded no weight and that Mr Green acted as an advocate for Snowdale.
386 I accept that no weight should be given to Mr Green's expert report.
387 An examination of progression of the various draft reports shows that Mr Green made, or acquiesced in the making of, amendments to his report which excised material which could be perceived as adverse to, or imply criticism of, Snowdale's case, or included material which could be perceived to assist Snowdale's case.
388 One example of such an ameliorating amendment related to the statement in Mr Green's final report in relation to the number of hens which went outside on to the open ranges.
389 In his final report, Mr Green said that he observed at the Roseworthy farm, what he estimated to be, "between 70% and 90% of laying hens exiting the barns regularly".
390 However, in the first draft of the report, being the report he had drafted, Mr Green had said:
After the opening of the pop holes to let the birds access the range area for the first time it will take a few days to see the maximum number of hens go outside. I have never seen 100% of a flock outside of a barn. Typically the numbers are between 40 and 80%. (Emphasis added.)
391 Then, in the first version of the draft report prepared by Snowdale's solicitors, there was included, for the first time, a reference to Mr Green having observed free range hens exiting barns at Roseworthy farm. In this version of the draft report, Mr Green said he regularly observed what he estimated to be "between 40% and 80% of laying hens exiting the barns" at Roseworthy farm. However, in a subsequent draft of the report prepared later that day, Mr Green changed his estimate from "between 40% and 80%" to "between 70% and 90%". This change found its way into the final report.
392 The following cross-examination occurred:
Do you see immediately above question 4, again talking about Roseworthy, on this occasion you say:
I regularly observed what I estimate to be between 40 per cent and 80 per cent of laying hens exiting the barns regularly.
Do you see that?---I do see that in the last paragraph.
Would you agree with me that it is a significant change to go from between 40 and 80 per cent to 70 and 90 per cent?---Yes, it would be.
Well, not would be, was?---It is, yes.
Were you told that whether or not more than 50 per cent of chickens went outside was of critical importance in these proceedings?---No, not at all. That's a mistake on my part.
Do you agree that your report now, your final report now, is talking about figures more than 50 per cent?---In Roseworthy, yes.
Whereas your original report is talking about 40 and 80?---Yes.
…
Was that change made in order to get your estimation above the 50 per cent line?---Definitely not.
Who made that change?---I did.
You're talking about your assertions about what you had observed between 2010 and 2012?---Mm.
Yes?---Yes.
393 I do not accept Mr Green's explanation that the subsequent ameliorating amendment occurred because of his "mistake". Mr Green was reporting on observations he made a number of years earlier. No explanation was given by Mr Green for why his recollection of past events had changed so significantly in such a short space of time. I find that Mr Green made, or acquiesced in the making of, the ameliorating amendment because he perceived it would assist Snowdale's case.
394 Another example of such an ameliorating amendment related to Mr Green's initial comments in relation to the hens negotiating access and egress to and from the sheds when the pop holes were at some distance from the ground at Carabooda. The evidence was that the pop holes at Carabooda were up to a metre from the ground. In his first draft report, Mr Green had said that the height of the pop holes at Carabooda ranged from 50 cm to 100 cm, with an average around 75 cm, and then he said: "Ramps would be ideal." There were, in fact, no ramps at Carabooda. By the time Mr Green produced his final report, the words: "Ramps would be ideal" had been deleted. In cross-examination, Mr Green said that he could not remember why the change had been made and he could not really say who had made the change.
395 A further example of the amelioration of the language from the initial draft reports, which Mr Green had written, to the final report, occurred in relation to his observations as to the effect of having pop holes on only one side of a shed on the ability of the hens to exit the shed. It was the case, of course, that for a considerable period of the relevant period there were pop holes on only one side of each of the sheds at Carabooda, and for the whole period of the relevant period at Swan Valley. In the second draft of the report written by Mr Green, he said:
The use of the physical openings being only on one side of the shed would have slowed the ability for hens to exit the shed.
396 In the subsequent version of the draft report, which was prepared by Snowdale's solicitors, those words had been modified to read:
However, the effect of having pop holes on only one side of the laying barn would, I believe, have slowed the ability for hens to exit it to a degree, which I am unable to quantify.
397 That language remained the same in the subsequent drafts of the report, and appeared in the final report. The following cross-examination took place about that amendment:
Can you see that?---Yes.
And do you agree that that has been watered down from what - the opinion that you previously expressed?---Yes.
And if you go to page 14, back in the bundle, further back in the bundle, we can see that this report was attached to an email from Mr Dobson to you?---Yes.
Who watered it down?---I can't honestly say.
Why was it watered down?---I don't know.
398 A further example of an ameliorating amendment was in relation to Mr Green's opinion as to the effect of a central nest box structure on the ability of the hens to reach pop holes on the opposite side of the central nest box structure.
399 As to the effect of there being a central nest box structure in the sheds at Carabooda and Swan Valley, Mr Green said in his final report that he had observed conventional free range barns at three locations, Sunrange, Muchea and Bullsbrook, with pop holes on only one side of the barn where laying hens had exited the barns in large numbers. In that report, Mr Green said there were gaps at the end of the nest box structures at two locations and ramps over the nest box structure at one of the locations. There is no reference in the final report to there being gaps in the central nest box modules at those locations.
400 However, in an early draft of the report drafted by Mr Green himself, he said:
I have observed free range conventional barns with pop holes only on one side of the shed. These barns had gaps between the centre nest modules for the hens to freely move across the shed.
401 In a later version of the document, drafted by Snowdale's solicitors, the wording changed to:
I have observed free range conventional barns at [NAME THEM] with pop holes on only one side of the shed, at which I observed laying hens in large numbers exiting the barns. These barns had gaps of approximately x metres approximately half-way along the centre nest modules for the hens to move across the shed.
402 However, as mentioned, in the final report, there was no reference to there being gaps between the centre nest box modules in the sheds at the three locations to which he referred. Mr Green's previous reference to those gaps had been removed.
403 In cross-examination, Mr Green said that his reference in the first draft of the report to his having observed "free range conventional barns" which had gaps between the centre nest box modules, had not been a reference to his observations of the "free range conventional barns" at the three farms which he subsequently named in the final report.
404 The following cross-examination then occurred:
Do you agree that gaps in the middle of nest boxes would make it considerably easier for chickens on the blindside of a shed to get to a pophole?---Yes.
Was that change made so that you were watering down how good the conditions were at these other farms?---I - well, if it was, it wasn't intentionally.
Who made that change?---I honestly can [sic] recall.
405 I do not accept Mr Green's evidence that, in his first draft report, he had been referring to free range conventional barns, other than the barns at the three farms he subsequently named in the final report, as an explanation for there being no reference in the final report to there being gaps in the centre nest box modules. This is because, although in his first draft, Mr Green had not named the locations of the barns, when he was asked by Snowdale's solicitors in a later draft (see [401] above) to name the barns he had observed, Mr Green then included the names of the three farms. Mr Green's evidence is simply implausible. I find that Mr Green deleted, or acquiesced in deleting, the reference to the gaps in the centre nest box modules in the final report because he perceived that it would assist Snowdale's case.
406 The ACCC referred to a further deletion from an earlier draft report prepared by Mr Green about flock sizes. In an early draft report, which was written by Mr Green himself, Mr Green answered question 3 about the impact of flock sizes as follows:
There may be behavioural problems if is [sic] flock sizes excessive and if there was not enough openings in the barn for the hens to exit to the range area. These conditions could put stress on the hens may cause some overcrowding around the pop holes.
I can say I never observed any of the described conditions at Carabooda and Swan Valley. A measure of a flock is in its performance figures. Rate of lay, mortality, first grade recovery rate, egg size to age, shell quality, these are just a few indicators that tell you a flock has the right conditions are correct management [sic].
407 As is evident from [368] to [370] above, Mr Green answered question 3 in the final report in a very different manner, and the two paragraphs in the preceding paragraph, did not find their way into the final report.
408 It is also relevant to mention at this stage, as I have previously mentioned, that Snowdale declined prior to trial to discover documents relating to egg production nor to provide an estimate of flock sizes based on egg production. Also, as I have previously mentioned, Mr Cocking, before the commencement of this trial, and at trial, stated that Snowdale did not maintain records of flock sizes, save to the limited extent pleaded.
409 Mr Green was cross-examined about the extent of the information given to him by Snowdale which he used to form the opinion he had expressed about the performance of the flock. The cross-examination was as follows:
And you say in this early draft you never observed any of those conditions at Carabooda and Swan Valley. Were you - or did you at any time check the measures of the flock that you refer to in that draft report, such as rate of lay, mortality, recovery rate, and so on?---Yes.
And you checked those?---Every time I went to the farm, we discussed performance production - - -
Okay?--- - - - how things were going.
And you were provided with information about, for example, flock sizes - - -?---Yes.
- - - and how many eggs were being laid?---Yes.
Right throughout the entire period you were attending?---More often than not we would always talk about rates of lay and production. First grade eggs.
Throughout the period?---Throughout the period.
HIS HONOUR: What period are you talking about there?---Well, I'm assuming it's the period after 2011 to 2013.
410 The following cross-examination occurred as to the absence of the two paragraphs, referred to at [406] above, from the final report:
Who deleted those bits?---Well, it was a - well, what happened was, because I was not used to writing reports to this extent, Phillip Dobson said we should review the whole thing, and - over the phone, which took several hours. We - he would ask me the questions, and I would tell him what I thought, and then we would put the answers together that way.
But you've already told Hotchkin Hanly a measure of flock is in its performance figures. Rates of lay, mortality, first grade recovery rate?---Yes.
You've already told him that, and was that truthful?---That's truthful.
How did it come to be deleted from the next version?---I don't know. Cannot remember.
And - - -?---I think probably we thought it was irrelevant at the time.
And you also deleted - sorry, you - someone deleted if there were not enough openings in the barn for the hens to exit the range area, that was deleted?---Yes.
And conditions that could put stress on the hens, which may cause crowding around pop holes, that was also deleted?---Yes.
411 In my view, Mr Green was unable to provide persuasive explanations for the ameliorating amendments and deletions which he had made, or to which he was party, over the course of the evolution of the production of his final expert report.
412 Accordingly, I find that Mr Green did not act as an independent expert. In my view, Mr Green did not approach his role as an expert witness from the position of a person who owed a paramount duty to the Court to express an independent opinion. Rather, I find that Mr Green was prepared to participate in a cooperative venture with Snowdale and its solicitors whereby he was prepared to mould his views, or acquiesce in the moulding of his views, into a form which would, to the best extent possible, assist the case of the party that had retained him. In my view, the manner in which Mr Green approached his role is reflected in the following email that Mr Green sent to Snowdale's solicitors on Monday, 16 February 2015:
Phillip,
This is the report. Courier will be hear [sic] in 15 minutes.
Is there anything we can change before he arrives.
Dennis
413 I, accordingly, place no weight on the report produced by Mr Green and otherwise approach his evidence with considerable caution.
414 There are also other reasons for making this finding.
415 During cross-examination, Mr Green said his visits to Carabooda were usually between 11:00 am and 12 noon. The following cross-examination occurred:
And did you always see chickens outside when you were on your way to visit Peter Groot and on your way back?---In that period of time, yes.
Were there ever any occasions when didn't see chickens?---Not that I can recall.
416 Later in cross-examination, it was put to Mr Green that he had not seen chickens outside in the mornings on his way to visit Mr Groot or on his way back. Mr Green said that he had always seen chickens. Mr Green's insistence that he had always seen chickens, notwithstanding that he visited Mr Groot between 11:00 am and 12 noon, was at odds with the evidence of Mr Groot that the pop holes were not open before 12 noon at Carabooda.
417 Further, Mr Green said, during cross-examination, that he had seen chickens outside at Swan Valley in October, November and December 2013. This was after the date that the free range chicken operations had ceased at Swan Valley.