this is why I don't use it. I have it turned on, so I'm unable to have any young animals in my zoo. I turn it on and way too many show up...like for reptiles, etc. The controls need to be more flexible by breed, or something like that. Also, the contraception is tied to aging...so they have offspring, but they grow too fast. Its like an endless cycle. SO now I have young red pandas, but I don't want these animals in my zoo. I only want this animal to age to I can get rid of them, but if I turn on aging all the young animals are no longer young. The best of all worlds would be if aging and contraception were able to be toggled separately for each animal species.