If you ate nothing but junk food, what would you be like? Probably cranky, with health problems ranging from high cholesterol to obesity to heart disease. Feed your puppy the equivalent of canine junk food and that will describe her, too. What your puppy eats will affect her health and behavior. In general, you will pay more for higher-quality food. Is it worth it? Yes. If you pay more for what goes into your puppy, you'll likely pay less in veterinary and medication bills because your puppy will be healthier. She will have a better coat and skin, and be less likely to be irritable or hyperactive.

At first, it's best to feed your puppy whatever she was eating before you brought her home, at least for a few days. Do your research on food, and should you decide to switch, do so gradually, over the course of a week or so. If you switch foods on her suddenly, you could upset her stomach.