Chihuahua puppies have tiny stomachs and lots of growing to do, so every meal needs to work hard for them. The best puppy foods for Chihuahuas include puppy formulas that deliver enough calories and nutrients in portions suited to their small size, with kibble that little mouths can comfortably manage. Young toy-breed puppies may also need several appropriately portioned meals throughout the day. Your veterinarian can help you establish a feeding schedule and adjust portions as your Chihuahua grows.