Warren Wiersbe, God Isn't In a Hurry, (Baker Books; Grand Rapids, MI, 1994), p. 30
A farmer with a severe leg rash visited a specialist and endured a series of tests. The doctor told him, "You will have to get rid of your dog. You're allergic to him." As the patient was leaving, the doctor asked, "Are you going to sell your dog or give him away?"
"Neither one," said the patient. "I'm going to get me one of those second opinions I've been reading about. It's easier to find another doctor than a good bird dog!"