What are the various feeds available for dogs?

Three main types of commercial foods are available today: dry, semi-moist, and canned. These differ primarily
in their ingredients and the amount of moisture they contain. The main ingredients in dry foods are corn,
soybean meal, wheat millings, meat, and bone meal. Ingredients in semi-moist foods are corn, meat byproducts,
soybean meal, and corn syrup. Canned foods are of two types: (1) a ration type that contains barley,
meat by-products, wheat grain, and soy flour, and (2) a meat type that contains meat by-products, meat,
poultry, and soy flour. Dry foods contain about 10 percent moisture; semi-moist contain 30 percent; and
canned foods, 75 percent.
Their nutrient compositions also differ. Dry foods contain approximately 23 percent protein, 9 percent fat,
and 6 percent fiber. Semi-moist foods have about 25 percent protein, 9 percent fat, and 4 percent fiber. The
ration-type canned foods contain about 30 percent protein, 16 percent fat, and 8 percent fiber, whereas the
meat-type canned foods contain 44 percent protein, 32 percent fat, and 4 percent fiber. Most foods contain
about the same amount of energy.
Dry foods have the advantage of being cheaper to purchase and convenient to use; they also will not spoil
and help keep the dog's teeth clean.