I *knew* the good feeding response was too good to be true...

My 1.0 normal hit 600g three months ago, and he's decided that eating isn't one of his hobbies anymore.

Nothing much has changed, at least not from when he was eating regularly.

Temps - 81 cool, 92 warm, 65-70 percent humidity. Same hides as he's always had (nice snug, dark, cave-type), same temps, same substrate (aspen), same water bowl. Had a fecal run, nothing out of the ordinary.

He *was* in a 20 long, but moved him over to a tub a month ago, to see if it would help. It didn't, obviously.

Won't touch f/t. Only mice for sale around here are tiny, so I've been leery of giving him mice... as I was advised that it would take more energy to digest a mouse than he'd get from it. I'd be open to the idea of feedng multiple mice, I'm just concerned he wouldn't take them - or only take one.

We always prescent the room - he comes right out of his hide within minutes of the rat in the room, and is VERY interested until the rat is in the enclosure with him... then he loses interest, sort of. He'll go right up to the rat and sniff it, poke it, inspect it... then wig out and go into major avoidance mode. Within seconds, he's interested again - goes through the same sniffing/inspecting behavior again.

Freshly killed rat - nope.
F/T rat - nope.
Live rat - nope.
Live rat that has sat in dirty mouse bedding for awhile - nope.
The car ride trick - nope.

To my knowledge, he's never been bitten - I supervise all feeding, and I've never seen him harassed or bitten by any of his meals.

I feel like I'm stressing him out by all these failed feedings. He's dropped to 550 - so he's lost 50g in 3 months.

So if this was your snake, what would you do? THANK YOU in advance for any replies I get...