ORIGINAL: 4evrhtn
Can't explain a buck not being interested in receptive doe's but most times when a male animalmounts another male it is a display of dominance. It is seen more in dogs than anything else I have witnessed. That is why it is common for puppies who are incapable of breeding doing it to each other and their owner until they get put in their place enough times. If it was hormonal it would continue to worsen as the pup reaches maturity.
until i got my lab neutered,he would hump a male dog and was very aggressive,even to point he would bite a person if you pulled him off.
he is AGGRESSIVE DOMANIAT dog.
its gotten better but he still will show it and no MALE dog can come on his property without him getting tough.
on deer,FOOD can cause a deer to do what he did.