Your situation is understandable, I have seen from even big breeders with hundreds of animals that some of them just really don't take well to f/t. I'm sorry you've been having to do something that is emotionally draining to feed your animal, it can't be an easy thing to do.
How are you preparing your f/t mice? like under a heat lamp, with a hairdryer, in hot water...? Maybe if we go through enough factors, we can find something that is bothering your one particular BP and not all the others. I've heard some like only a certain color or sex of feeder, some maybe don't like them if their fur is wet, and a problem I once experienced when I was new was not having heated the feeder up enough.
