BILLINGS, Mont. - The surprise baby beaver born last month at ZooMontana continues to surprise Zoo staff. Baby Shiloh, a female North American beaver, is less than three weeks old. In July, her mother, Huckleberry, unexpectedly gave birth to two kits. Zoo staff were surprised because they didn't know Huckleberry was pregnant, and because the male beaver, Finn, was supposedly neutered. Unfortunately, one kit was stillborn, and Shiloh herself was essentially dead at birth. The