So i put my male whos 1 year and my female 11 months shes a little bit bigger than him anyways i put them together for the first time to breed and he bites her tail and puffs at her while she runs away then he head bobs and she has no response hes gotten on top of her 3 or 4 times but wont go any further and she just ignores him how can i get these to to mate?