I have about a 4 foot ball python and he won't eat a medium frozen rat, he usually eats them pretty quickly, but since we have had him (we have had him for about 3 months) this is the longest he has not eatten. It has been 14 days. He isn't about to shed, he has a clean house, he is not getting sick. What else could it be? Any advice to get him to eat? We thaw it and it is at between 85-90 degrees.