I just continue playing. I get to 90 then turn on a master breeder then he'll make new babies as elders die. I
name each group of babies alphabeticly so I know which gereration they come from. By the time I get to W's the A's have all died off. This is a big help when trying to find the right age to breed. Most of them have to be taught how. If you watch them, they do all kinds of things. I really think they have different personalities. Some are lazy, some complain, argue, and some are always telling jokes.