Nintendogs is, for want of a better description, Tamagotchi with a canine slant. You can nurture up to three cute and cuddlesome puppy dogs and teach them new tricks and stuff. Lovers of man's best friend will also be able to speak into the DS's built-in microphone and get them to perform to taught voice commands. Siiiit!
Apparently the title does support wireless connectivity, so you may well indeed get to play it with your pedigree chums.
Probably not everyone's, erm, can of dog food, but you can check out the latest screens on this very page.
Start saving your DS dog biscuits now.