A man took his dog to the vets for an examination. The vet put the dog onto the table and brought in a large black cat which sniffed the dog, looked him up and down and then walked away. Next the vet brought in a cream Labrador, tail wagging he sniffed the dog all over, woofed excitedly then trotted off. the owner of the dog was mystified and demanded to know what was wrong with his animal. Well sir, said the vet, once we have the results of the cat scan and lab report we may be able to make a diagnosis....