Wet food. Wet food is the stuff that comes in cans. Pet nutritionists find it superior to dry food because it provides the dog with things they don’t get in dry foods. First, good wet food has enough water to keep a dog properly hydrated even in a dry climate, though the owner must always make fresh water available. Wet food is also preferred by dogs with misaligned bites or unusually small mouths because it’s easier to eat. Any human who has opened up a can of wet dog food can’t help but notice its smell, and the dog, who understands the world through its sense of smell, notices it even more. The aroma of wet food can entice an older dog whose sense of smell is fading to eat.