Recommended daily amount: 2 cups of a high-quality dog food daily, divided into two meals.

How much your adult dog eats depends on his size, age, build, metabolism, and activity level. Dogs are individuals, just like people, and they don't all need the same amount of food. It almost goes without saying that a highly active dog will need more than a couch potato dog. The quality of dog food you buy also makes a difference--the better the dog food, the further it will go toward nourishing your dog and the less of it you'll need to shake into your dog's bowl.

Sussex Spaniels gain weight easily. To keep his weight at a normal level, feed your Sussex at specific times each day rather than leaving food out all the time. Measure food carefully, and cut back if it looks like he's putting on the pounds. He should have a waist when you look down at him, and you should be able to feel his ribs but not see them. If they're buried beneath rolls of fat, he needs to go on a diet. Dole out treats sparingly. Your Sussex will be just as happy to get a tiny-size training treat as a bigger biscuit.

For more on feeding your Sussex, see our guidelines for buying the right food, feeding your puppy, and feeding your adult dog.

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