I bought a male and female California white pair back in the summer. I held them separate and bred them September 1st. No babies in Oct. I rebred in October and no babies in November, I rebred in November I even left her in with the buck for a week and no babies again. I am ready to butcher these 2 and have them for Christmas Dinner. They have a mineral wheel in their cage, fresh water and I feed medicated Rabbit pellets. I have checked their genetalia and it looks fine. I have seen them breed aggressively. One time she pulled out her hair in November, but never had any babies, no evidence of it. The other times she never even pulled out her hair.