Petz 2: Catz and Petz 2: Dogz
The Petz series is a long-established classic in the pet-raising world of games. In these games, it's purely about looking after your animals: whether you get the Catz or Dogz edition, you'll see many of the same features. Bathe and clothe your pet, take photos of them, take them for walks, play games with them, see how much they love or hate the various tools and toys you have in your arsenal, and even take them fishing. With the Wii remote, you'll be playing for hours with a pet that's really yours.
Sims 2 Pets
The Sims has often been about raising humans through their trials and tribulations of home ownership. The Pets expansion pack and corresponding games on the Wii and other consoles brought it to a new level. Instead of simply "raising people," you are helping them raise pets as well. Cats, dogs, guinea pigs and birds can liven up your Sims' homes and become a talking point with the Sims' love interests. You decide whether your Sims will become loving owners or neglect their responsibilities.
SimAnimals
Continuing Maxis' tradition of simulation games, SimAnimals puts you in control of an omnipotent hand guarding a forest filled with animals. These animals are largely self-sufficient, but it's up to you to solve some puzzles, watch them interact and guard over them as you explore the forest with them. You can unlock new areas, move trees and form lakes as you play. The animals will display personalities, and strange alliances will form as you watch. It takes pet-raising to a new level: watching these animals in their natural habitats.
Harvest Moon: Tree of Tranquility
Few farmers grow really attached to their livestock; even fewer would classify them as pets. Then again, the Harvest Moon series hasn't always done farming by the book. In a new twist with the pet genre, Harvest Moon puts you in charge of a farm, which you can fill with livestock, as well as ride your horse and walk your dog around. In this game, players quickly grow attached to the sheep, cows and chickens they raise, but they also benefit from the relationship, as the wool, milk and eggs turn into profit for your farm, allowing you to purchase new crops, additions to the home, and eventually start a family.