As I have said before: the number one killer and maimer of dogs in this country is the can opener. That is probably true the world over; I believe this photo came from Australia.
A lot of people -- including some veterinarians -- do not really know what the correct weight is for a dog.
Here's the answer: If you cannot easily feel your dog's ribs, it is too fat.
And I don't mean you should have to dig into the flesh to feel those ribs -- you should be able to run your hands down the side of a dog and feel at least three or four of them without even trying.
If you have a smooth-coated adult dog like a pointer or a smooth-coated Jack Russell, you should be able to see at least two or three ribs when the dog breathes deeply after running a short distance.
Rest assured that no one who reads dog-oriented web sites and books is ever going to have a dog that is too thin. People who sign up for canine list-servs, buy books on dogs, and read pet columns in the newspaper are much more likely to feed their dogs to death than they are to run their dogs even a pound or two too light.
How do you get the weight off a fat dog? Simple: stop feeding it so much.
Portion control IS weight control.