Is your male neutered? In the animal world mating can be very aggressive. They animals give off scents when it is time to mate and it is instinctual for the the male to take a female who is in season. I didn't realize Sammy was sooo young. Please take Sammy to the vet to make sure she is doing ok with her pregnancy. How pregnant is she? Due to her age she may have a small litter. Let's hope so. Is your male trying to mate with her now that she is pregnant?