Like humans, dogs require a carefully balanced diet. Providing your dog with the right food can help keep it healthy and free of disease. But, like people, every dog has different needs when it comes to what it eats. Here’s how to tell if you need to make a few simple adjustments to your dog’s diet: Your dog’s food should change as they age. From puppies to adult and senior dogs, each stage of a dog’s life requires a balanced diet. Puppies grow rapidly, which means they need calorie-dense food t