Why the increase in high mortality flights?

The recent high mortality flight to Singapore is yet another high mortality flight to have occurred in the last year.
Whilst Ms Penfold of ALEC points out that there was only one other high mortality sheep flight in 2013, she conveniently didnt mention that since September 2013, there have now been at least four high mortality live export flights - yes two of the three (Reports 47 and 48) were cattle. So no high mortality flights at all between Feb 2010 and Sept 2013 but now at least four between September 2013 and early October 2014
So an unprecedented 13 months of high mortality air incidents it would seem and all somehow cite some failure in ventilation even if no mechanical problems found. Are planes suddenly breaking down all the time? Or are they perhaps being overstocked? Are the animals being left on the Australian airport tarmac in the full sun before they get on the plane (as shown in a photo sent anonymously to VALE)? Whatever the cause, these animals, 39.3% of them on one flight, suffered unacceptably.
Watch this space and read the Mortality Investigation Reports 47-49.