idk if it's been suggested before but i think it might be a good idea to implement how likely an animal is to give birth to a certain sex? 25%, 50% and 75%, maybe 0% and 100% too. this came to mind when i was playing and my tribe nearly died because i kept getting babies of the same gender. it could maybe work like, if one creature Male Gene: 100 and another had Male Gene: 0 they'd produce a baby with Male Gene: 50?