< Rez a lemur, click it and click Convert.

< The following buttons are available:

Breedable
Allows you to convert a breedable lemur into a pet lemur. Once you convert a lemur into a pet and you want to convert it back into a breedable, it will take 7 days to gain enough heat to breed again.

Pet
Allows you to convert a pet lemur back into a breedable lemur again. While a lemur is a pet it continues to age. By age 83, if you convert a pet back into a breedable it will not be able to breed.