Is your dog on a dry food diet with no moisture? Did you know that It takes more canned food to meet the nutrient requirements of the animal because of the moisture involved. Since canned foods contain about 79% water — and remember water has no nutrients — it simply is a dilution issue. Dry kibble foods have very little moisture (about 6-7%) and thus represent a more concentrated form of nutrients. Canned foods can be helpful in terms of making the diet more palatable and increasing water consumption.