I'd make sure you aren't using water too hot to thaw the rodent. I'd let it thaw naturally and then heat it with a blow dryer or something like that. If you cook the prey the snake wont take it. If you are buying the prepacked frozen mice from Petsmart or some place like that, just leave the bag out for a couple hours at room temp and it will thaw. Warm it up and present it. The only time I haven't been successful is when I overcooked the prey with overly hot water. it's a lot easier to do than you would think. Good luck! I hope he starts eating for you!