A free program for Android, by Tivola.

DogWorld is a fun, educational, and interactive pet simulator. You can play with cute puppies, dress them up, take pictures, and more!

It is an animal-themed game in which you take care of, play with, and wash your virtual dog. You will also get to feed them, take them outside, and put them to sleep.

You will be able to play with the following dog breeds:

American Pitbull Terrier 

Boston Terrier

Havanese

Golden Retriever

American Bulldog

Luxury Dog

Cooer German Shepherd

Great Dane

Rottweiler

Maine Coon

Maltese

Miniature Pinscher

New York Terrier

Pomeranian

American Family Dog

Chihuahua

This app is free to play. Some game items can also be purchased for real money.