My dog does not have diabetes!

I have a grand dog who is 11 years old. She is a black retriever and has been acting funny. She drinks a lot of water, and has been stealing food. It's been in the 100's, so the doctor thought she had diabetes. So I took her fat self into the vet yesterday, and to all our relief the doctor said, no diabetes, just a fat, old, and spoiled doggy.