Yes there is, it's Disney's toontown. Here is the site toontown.go.com/
On Horseland you can breed horses and dogs. For Nintendo ds the is a game called nintendogs
Yes BarbieGirls.com is a great virtual life game for girls.
Diablo 45000. This is a rare game for the pc.
I know one, The Travels of Wiglington and Wenks Virtual World
YES 100percent look up free rpgs or free virtual pets easy as 123/ 1. ourworld 2. club penguin 3. neo pets 4. show cats/dogs........... why don't you just search on google?
I don't think there are any 3d ones but I came across a game called webosaurs
The movies game Virtual Families
No
You have to get lots of money then go to the kennel then go to buy and choose a dog yere you have 2 save some money around 500 odd or 600 odd you can get money by going to contests if you come in top 3rd but if not then you don't get any money .
Second life
That's my question! All I can think of is Poptropica.