I purchased a small zonata in the early 80s. The seller knew nothing about the snakes history. It looked good and was a great eater but one day I came home and he was dead. The same thing happened with 2 or 3 WC adult Tangerine Hondurans back in the 80s. They appeared to be in perfect health and were all great eaters but all died sudden mysterious deaths. I suppose now I should have flushed them out.