Congratulations on the clean bill of health.
Try not to worry too much he is off feed. My little bitty Pied male stopped eating at a mere 325 grams. He eats about every other week now, but he only ever eats one mouse. :frustrate
As long as he's still eating something, I try not to let it get me down.
Just be patient, it's all you can do now. And remember, this whole non eating thing is a lot harder on us than it is on them.
Gale