Yorkshire Terriers typically do well on a high-quality commercial dog food. Make sure the food you choose meets the nutritional standards of the Association of American Feed Control Officials. (Look for the AAFCO statement on the package.) When selecting a food, factor in your dog's age and choose a formula that fits their stage in life (puppy, adult, senior). Since Yorkies are small in size, they don't need nearly as much food each day as, say, a Mastiff. But they do have very fast metabolisms, which might leave them feeling hungrier faster. Talk to your vet about possibly serving your Yorkie puppy three or four smaller meals per day instead of the classic morning and evening feedings. Your vet is in the best position to help you nail down a diet and feeding plan for your individual dog. The Yorkshire Terrier also loves a heavy dose of appreciation, especially in treat form. But while training treats are great for training, you don't want to overdo it. Remember that those little morsels of praise amount to calories, and even an extra pound can make a big impact on your dog's overall health. Treats should only constitute a small percentage (10 percent) of your pet's daily food.