Here's the joke...

When our client's dog lapped up anti-freeze, the veterinarian I work for ordered a unique treatment: an IV drip mixing fluids with vodka. "Go buy the cheapest bottle you can find," he told me. At the liquor store, I was uneasy buying cheap booze so early in the day, and I felt compelled to explain things to the clerk. "Believe it or not," I said, "this is for a sick dog." As I was leaving, the next customer plunked down two bottles of muscatel and announced, "These are for my cats."