Small pet

Small Pets in The Sims
In the original Sims, only one small pet was available from the very first game: fish in the Posiedon's Adventure Aquarium. Your Sims obviously have to feed the fish and clean the tank to ensure they remain healthy. In Livin' Large, the guinea pig was introduced. If you didn't clean its cage for a long time, and then it bit you, your Sims would become sick. The fastest and easiest way of curing your Sim's sickness is to buy the guinea pig painting and look at it.

A lot more pets were introduced with The Sims Unleashed. Sims were able to go to Old Town and purchase a variety of small pets, including iguanas, turtles and small birds such as budgies and love birds. All of them require feeding and cleaning occasionally, but they don't need as much attention as the larger pets such as cats and dogs.