Why did 16 polo ponies die on the trip across Bass Strait?

[bob10]

www.abc.net.au/news/2018-04-17/polo-ponies-death-on-ferry-cause-needs-to-be-released-rspca/9662660?utm_source=sfmc&utm_medium=email&utm_campaign=%3a8940&user_id=c17365ab07572ed90614d245ada5ad675f6bc00189 fa766123c70d76d1d7cddf&WT.tsrc=email&WT.mc_id=Email%7c%7c8940&utm_content=RuralMail_ArticleLink (http://www.abc.net.au/news/2018-04-17/polo-ponies-death-on-ferry-cause-needs-to-be-released-rspca/9662660?utm_source=sfmc&utm_medium=email&utm_campaign=%3a8940&user_id=c17365ab07572ed90614d245ada5ad675f6bc00189 fa766123c70d76d1d7cddf&WT.tsrc=email&WT.mc_id=Email%7c%7c8940&utm_content=RuralMail_ArticleLink)

[bob10]

Minister refuses to release details of probe into polo pony deaths - ABC News (Australian Broadcasting Corporation) (http://www.abc.net.au/news/2018-04-20/minister-refusing-to-release-details-of-probe-into-horse-deaths/9675676?utm_source=sfmc&utm_medium=email&utm_campaign=%3a8940&user_id=c17365ab07572ed90614d245ada5ad675f6bc00189 fa766123c70d76d1d7cddf&WT.tsrc=email&WT.mc_id=Email%7c%7c8940&utm_content=RuralMail_ArticleLink)