Were you looking for Dry Food for cats?
The Dry Food is the basic food in Nintendogs and its 3DS sequel. Most dogs are used to it and don't mind eating it, since it is good for them. it can be bought from the BARC shop in the 3DS version for $3. In the 3DS version, the player can change what bowl the dry food is served in.
DS: "This is a well-balanced meal with all necessary nutrients. (Single-Use
3DS: "Basic, everyday food for active and healthy puppies."