What are some good online pet games

I think you probably wanted the ones that is virtual and you don't have to register...so I'm only doing those. There are many kinds of animal
Cat and Dogs:
1. Net Pet Adopt

Pet Shelters:
1. Animal Shelter
2. Baby Animal Shelter

Fish:
1. Babyz Bratz Fish Tanks
2. Fish Tycoon

Dinosaurs/Dragons:
1. Exhibited
2. How to Raise a Dragon

Hope that helped!!! :D