When making a decision about what type of diet to feed, you need to consider, among other things, your pet’s age, size, breed, and any existing medical problems. One of the issues with semi-moist types of food is they tend to be quite high in salt and sugar. Dogs do not need this much salt and sugar in their diet. In addition, sticky, sugary foods can contribute to dental disease.
For large-breed dogs, most people choose a dry food, for several reasons. Larger breed dogs require more food than smaller dogs, and dry food is cheaper easy to transport, store and prepare. Because canned food contains a much larger percentage of water (about 80%) than dry foods (usually 10% or less) it is usually more economical to feed on a per-serving basis.
The typical dry dog food is about 45% carbohydrate and some research suggests that this may pre-dispose certain dogs to becoming overweight and possibly developing diabetes as they get older. The typical diet of wild dogs is thought to be roughly 45% protein, 45%fat and only 5% carbohydrates. Dry pet food requires a fairly high carbohydrate content in order for the kibble pieces to stick together. However, canned food is typically much lower in carbohydrate content (about 10%). Some veterinary nutritionists recommend that dogs, especially those with a tendency toward obesity, be fed a canned diet with a protein, fat, and carbohydrate content as close as possible to a ‘wild’ diet.