I purchased 2 chins from a pet store I was told they where both males I get them home set them up in the cage an notice one of them humping the other alot didn't think much of it until a friend of mine who is a vet and was noticing the behavior of one of them humping the other decided to check there sex and confirm they where both males well ones a female. I took her out of the cage and seperated her she is only 3-4 months old and weighs 360 grams could she be pregnant I am worried can I feed her anything to fatten her up I know she is weigh to young for this I trusted the pet store saying they where both males.The male is 6 months old. I really appreciate any help.