My female Mojave (500 grams when I got her around 2 months ago) stopped eating for 6 weeks. She ate two X-large F/T mice the first two weeks, but refused everything after that. I tried everything I could think of just like you with no luck. Two weeks ago I went to the pet shop and picked up 2 live mice, I wanted large ones because she is not exactly a small snake at 500 grams. All the local shop had was a couple of small mice, just a snack for sure, but I bought them anyways because I wanted to at least keep trying. I put one in her tub and after about an hour I checked in on her and the mouse was gone. She ate it! I kept thinking the thing might have escaped because I just could not believe that she actually ate it. So I put the other mouse in there and before I could slide the tub back in the rack she had struck and constricted it, and ate that one too. This past weekend I bought a small/medium live rat and put it in the tub. All she did was strike at the thing. Never once did she attempt to constrict. Out comes the rat to be fed to my big normal female who ate it immediately by the way. So I went out and got another couple of small mice, and whaddaya know she ended up eating both. Keep in mind I had previously tried a live mouse, but it was on the larger side.
So what I have concluded is that for some reason right now she is simply intimidated and stressed by anything larger than a small mouse. So now, to my chagrin, I am going into the mouse/rat breeding hobby. LOL. Something I was convinced I would not have to do. Welcome to the world of ball pythons right?. My advice is to give a couple of small mice a shot. Smaller than what you would think to feed. See if that works, maybe you'll get lucky.
Paul
KING KONG CONSTRICTORS