Here are a couple neat and simple tips from Hove: One, look at your dogs profile from above. It should look like an hourglass, with the outline spreading out along the chest, then curving in toward the stomach and back out along the hindquarters. If your dog has a straight profile from front to back, or if it resembles a beach ball, he's too fat. Second, watch your dog run. Generally, you should be able to see a dog's ribs when he's running, but not sitting. And if you can't feel your dog's ribs, then your dog's ribs have too much padding.