The guidelines on the package are a great starting point, Eldredge says, but "you have to customize [them] for your dog." For instance, her family has three dogs who all weigh almost the same. But, one is getting twice as much food as the other two, and she's thin. "She just burns it up," Eldredge says. Your dog's breed and activity levels will affect how much food she needs.
Get enough calories.
Small-breed puppies, especially toy breeds, can be prone to hypoglycemia. To keep your dog’s blood sugar levels up, you might have to feed her more frequently and up the calories, Eldredge says.
Small-breed puppies grow quickly, so during the first six months, they need to eat more food and eat more frequently, generally three to four times a day. After six months, feeding two meals a day is usually sufficient. As your dog gets older and less active, her nutritional needs change, and she may need a formula for mature dogs. Her new food will generally have more protein and fewer calories.
Choose the right bite.
Smaller dogs have smaller mouths and teeth, so their food is usually made in a smaller bite size, which is easier for them to chew and swallow.