My buck is trying very hard to breed, he is 7 Months old and my 2 does are 6 1/2 months old he is smaller than my does (all are mini lops) and can't seem to find the right hole and will try to breed with there heads and sides after he tries the right position, whenever I try to help him and lift the butt up he backs off and won't go near them for the rest of the day, he also has been getting vicious with the other rabbits, any advice, I put the doe in the bucks cage and also let them play and breed in there day cage. Any advice is there anything I can do to help them breed? Thanks in advance