Sims' Best Friend Pets adds dogs, cats, birds and little fuzzballs called 'womrats' to the core game. Fans of the franchise will get a kick out of the new furry friends, but if you're new to the Sims world, the other expansions offer a lot more bang for the buck. While the animals themselves sent us into cute overload, there's not a lot of real meaty gameplay here - not enough to make The Sims 2 Pets a must-have. So it's surprising that it took The Sims 2 four expansions before the game got around to adding pets. Many of us couldn't imagine life without four-legged friends tooling around the house, waiting by the door when we get home, crooning by the food dish, or curling onto our lap whenever we settle in to watch Battlestar Galactica.