This joke was told to me by my mother years ago. The inhabitants of one village were very dissatisfied with the quality of the local drinking water. After years of fruitless complaints to the local authorities, the villages chipped in, got enough money together to pay for a test and sent a sample of the water to a laboratory for testing. A few weeks later they got the result of the test. It said: "Your horse has diabetes."
(From the "Rest" of RHF)