There must be some other form of motivation as to why they would cxl simply because of old temps. What about the owners that pay big bucks for the upkeep of their horses that need to race to stay in the game? Show/ice is a reason to cxl to keep all parties safe but cold temps makes no sense.
A poor decision by the gm.

Anticipated temp for post time on Sunday in East Rutherford is 21 degrees. They raced last Saturday night in the low teens. I hate conspiracy theories, and I hope I'm wrong, but don't be surprised if the purse money saved from the loss of these "cheaper horse" cards, wind up as higher purses in the spring and summer when the bigger stables - the usual suspects - are more involved. I'm not blaming the track. Horseman's organizations primarily represent the blue bloods interests. Money goes to money...

You forgot to add ZERO wins..At BATAVIA 

Ends up in the shit pile and some guy picks them up. No tests are done.

In most jurisdictions. First thing that happens is vet draws 6 vials of blood that get sent for testing. Then the horse is loaded into the ambulance and hauled off the track. Then it is sent to the university contracted to due the necropsy. After that it is picked up by a rendering agency just like any other large animal that passes away at a large animal clinic.

There must be some other form of motivation as to why they would cxl simply because of old temps. What about the owners that pay big bucks for the upkeep of their horses that need to race to stay in the game? Show/ice is a reason to cxl to keep all parties safe but cold temps makes no sense.
A poor decision by the gm.