Wet or canned dog food is significantly higher in moisture than dry or semi-moist food. Because the food is sterilized after being canned (sometimes it is also cooked in the can), it is often easier to ensure the sterility of wet food. A given wet food will often be higher in protein or fat when compared to a similar kibble on a dry matter basis (a measure which ignores moisture), however, given the canned food's high moisture content, a larger amount of canned food must be fed than with dry food.

Hill's Prescription Diets Canned Dog Food	Purina Veterinary Diets for Dogs Canned	Royal Canin Canine Theraputic Diets Wet Food
IAMS Veterinary Formula Canned Canine Food