From what I have read and been told males will breed at a younger age and smaller size then females, however its been said that if a female is breed to soon it can stunt growth, and or do bodly harm, if not death. I am in no way an expert, just passing on what I have heard, or read... If i'm wrong i'm pretty sure later when all the true pros get on and read this you'll get an honest full answer, and i'll stand corrected...lol...