yea I have been wondering about that. I did put a full size rat with him a few times and he shies away and it was too stressful having the rat sitting there so I would take it out and try a few more times to no avail. He likes the mid size rats and mice, I have fed him a few young Dagus and he likes those too but I am so limited where I live, one pet store for five hours that always runs out of live feed. If I could handle it I would breed my own food but I can't do it, maybe when my daughter gets older she will, I just can't raise animals and toss them to the snake. I will have a chat with the store about calling me when the med size rats come in because I think you might be right, he's hungry. This is my first snake and although I got him for my daughter, I am the care giver until she's old enough so its been a learning experience, glad to have found this forum because it seems active and a lot of help for us newbies