Horse meat for Consumption

Veterinarians, trainers, owners, and legislators are split as to whether horses can be slaughtered for human consumption (though I defer a listing of both sides of the argument until a later date).  But what about horse meat for non-human consumption?  

What about your lions, tigers, and bears (oh my!) who feast on horse meat?  Some zoos have switched to feeding beef, but horses have been found to be the most natural diet for zoo carnivores, and the meat most simulating what lions would eat in the wild.

Sensitive viewers beware of the photo below

A hungry lion receives a birthday cake made of 10 pounds of horse meat.

Arguments are heated on both sides.

Food for thought.