rabbits are induced ovulators,
meaning they oveulate when a buck is presented to them.
they do not go into heat like a cat or dog, its a misconception.
any doe in a cage next to a buck will in fact be purple and want to breed, but it is not a heat. they have no bleeding before or after ovulating.
as for castration, some does will bite the object breeding them, why?
A) they dont like the buck.
B) they are not willing to breed.
C) they are just plain mean does.
I have had just plain mean does, introduce them to a buck and the war is on, fur flies as does blood if not attended to right off.
I would never suggest leaving a doe in with a buck unattended, if you do you are risking injury or worse death to either rabbit.
I have had does who will breed the bucks brains out then all of a sudden get sick of his repeated attempts and attack. again another reason not to leave them unattended.
rabbits only need to DTD 3 times to insure a sucessful breeding.
it is then up to the doe to continue the pregnancy or to terminate it.
I have had does bred right up to a week before kindle abort the litter for no known reason, I have also had them absorb litters 2 weeks into a pregnancy.
Who ever said raising and breeding rabbits was easy, didnt have a clue as to what they were talking about.