Nintendogs+Cats: How to get gifts from your cat

Did you always want a gift from your pet cat in N+C? You can get gifts from your cat! You have to
-Leave your 3DS alone for 30 minutes or more
-Do NOT get in front of your 3DS. The face camera can recognize you and your cat(s) might come up and it will take longer for your cat(s) to get your gift
-It works best with the cat alone
-The gifts depend