Is your cat or dog over weight,this is easy to determine yourself. Firstly take a good look at your pet's ribs. If your pet is at a healthy weight, the ribs should be easy to feel, but you shouldn't be able to see them. Your pet should be covered with a thin layer of fat,but if the ribs are difficult to feel under a large layer of fat ,this means your pet is over weight. The next thing to do is take a look at your pets stomach.If it is sagging and you can grab a handful of fat ,this also is a sign of being over weight. Finally look at the animal from above, you should be able to easily see a waistline on your pet.If you have a dog,it should be an hour glass shape,this means broader at the shoulders and hips and narrow at the waist. Also a broad, flat back is a sign your pet is overweight.