I personally wouldn't try live just yet. If the breeder said it was eating frozen before, I'd stick to that. Try again in 5 days. Not sure if you mentioned how you heated the mouse up, but if you heat it up with a hair dryer to about 95-100F, it'll make it much easier to find the prey and the smell will kick em into feeding mode. If you DID use the dryer method, the mouse may have lost some heat from being waved around for a while. If that's the case, then just reheat it again. This is just how I do it with mine and he's naturally just a great eater Hope this helps!