(4 Audio Cassettes/4.25 Hours) For a rural vet, business is sparse in midwinter months. So Dr. Deidre "Didi" Nightingale leapt at the chance to earn a fat fee by appearing at a posh local fundraiser. Six mixed breed bobcat kittens were to be auctioned off, and all Didi had to do was give the cats a clean bill of health. But when the party's host walks in covered with bloody scratches - and promptly drops dead - Did is mystified. She recognizes the symptoms of rattlesnake venom when she sees them. And though the kittens may have a wild streak, the poison that killed Buster Purchase didn't come from any feline. Now it's time to go hunting for a two legged species of snake.