Kingsnake not eating - 3 months now

I posted this in the Kingsnake forum but I wanted to post it here as well so more people who may be able to help can see it. I'm getting worried.

So I am at a total loss on what to do next.

My Cali King hasn't eaten for 3 months now.

I have tried everything but he just shys away from everything i try to give him like he's scared of it. No interest what-so-ever in food.

The ODDEST thing is that he acts normal aside from that. He just shed in one full peice last week and he's still active in his cage, looking for a way out, making noise in the fake leaves, etc.

I clean his cage regularly, give him fresh water, temps are perfect, etc. Doing everything by the book and more.

He is breathing fine, he doesn't seem to have lost any weight at all. I see no signs of infection or scale rot or anything. He seems to be healthy. I've had him for 2 years now.

His body is still rounded, he doesn't look mal-nourished.

I am at a total loss what to do besides bring him to a vet now.

What's going on with my Cali King!
Help

What kind of prey have you been offering, live or FT?

He's been eating FT all his life.

He never missed a meal and then one week he just stopped eating.