Argh, I had this problem with one of my girls. Ridiculously frustrating. First of all, I would stop feeding in a separate container. It stresses them out, and feeding in their enclosure will not make them more likely to bite. If you're absolutely certain that the food is warm enough, then it's time for other ideas. What solved the problem for me was three or four tugs on the prey after the snake coils it to mimic the rodent struggling. After that, turn off all the lights and leave the room for a solid 15-30 minutes. There's no guarantee that will work, but it's worth a try.
One other thing. Check your rodents for any signs of freezer burn, which is expressed in small white spots on the skin (usually on the ears and legs). My picky eater hates freezer burned rodents. She absolutely refuses to eat the things, no matter how little freezer burn it actually has... To be fair, I wouldn't eat it either.![]()