A man brought a very limp dog into the Veterinary clinic.As he lay the dog on the table,the doctor pulled out his stethoscope,placing the receptor on the dog's chest.After a moment or two,the vet shook his head sadly and said, i'm sorry but your dog passed away."What?" protested the man hysterically."How can you tell?You have'nt doon any testing on him or anything. I want another opinion!With that,the vet turned and left the room.In a few moments,he returned with a labrador retriever.The labrador went right to work,Sniffing and prodding,The labrador sadly shook his head and said "Woof" The Vet