Two hours later when the foal hadn't yet stood or nursed, I started to worry. The filly's only attempts to stand were hampered by contracted tendons in both rear legs. She couldn't plant her feet squarely, and couldn't manage to steady herself upright. Another two hours later, I had spoken to my veterinarian, Dr. Tom Daugherty of Rood & Riddle in Lexington, Ky., and he had sent...