Hi! I currently have 2 kittens, a male and female that are comng up to 4 months of age. The male keeps biting the females neck gently, and she goes very still when he does this. He then lies on top of her, in a way i imagine he would if he was mating with her. But I thought he was too young for this at the moment. If my female cat becomes pregnant, will it be dangerous because she is very small, still a kitten. I would like them to maybe have one litter before being neutered and spayed, but when will she be old enough?