That is one thing that always bothered me about religion. The Animals didn't deserve to die because of Mankind's faults and sins. Whenever Noah's flood was discussed, I always wondered why Jehovah killed the Animals too. The same thing with Animal Sacrifices to Jehovah. Innocent Animals were killed for a God who would take delight in the burning Animal's "Pleasing Odor".
Animals should never pay for something that Humans did.
Take care, and thanks for the interesting topic!