If you are looking for a ds game you might give the Petz series a try. Dogz is one of the more popular games in the series. You get to pick from 18 different breeds of dogs. Once you make your choice you will be given a puppy of that breed. Now you have to be responsible and take care of it just like you would in real life. You must feed it, clean up after it's accidents, and give it love.
The thinkg that bothers me about this game is both good and bad. You cannot take your pet out for a wal around town until you have first gotten your pet its shots. You can not get it shots until at least 7 days after you have cared properly for your dog at home. That is 7 real days and this might be frustrating for younger users. The good thing is that it is more like real life since you must first make a vet appointment and then wait for the appointment to come.
This game is reated E for Everyone.