I'm having similar issues right now. Viserion has not eaten in a couple weeks now, prior to that he was pretty good eater. Unfortunately I've had to feed live mice, so I had been giving him 2 at a time, which he happily and speedily ate without problems. Now, he just gets a bit interested at first but then just stares at it. When it would get close enough for him to want to strike (he had been striking from whatever hide he was in, too lazy to stick his head too far out, ya know) he would just tuck his head back in his hide. After a while he would start to stalk it a bit, bu then give up and go back to his hide and watch. Eventually, the mouse just hides in the corner and the snake stares at it from across the enclosure.

This went on for way to long last week (20 minutes turned into 2 hours watching him) and this week I let it go on for half that. Eventually I killed the mice, left one in with him overnight wondering if he would do anything with (he didn't) and froze the other one. I'm hoping to get him to move over to f/t just because the local pet store doesn't keep anything live bigger than these little feeder mice. And that just isn't enough for him I think. Maybe that's the cause of not eating? Prey too small? Anyway, I have some frozen rat pups on order, I'm hoping to convert.