i have two gerbils. one is definitly male but the other im not sure...it looks exactly like the male except it has no nuts. so do i have a male and female or two males or what? another thing is that the possible female is suddenly loosing weight and she has a wound on her neck..could be a love bite because the male has one on his underbelly. the male is fine otherwise. he is fat. so whats the deal with the other one?