How old and how big is your BP (weight)? Petey is about 2 and a half years old now last time we measured he was 43"
What type of enclosure do you provide? It is a glass tank attached underside heat pad.
How big is your enclosure? HUGE... lets see... 36" long, 18" wide and 17" tall.
What kind off hides do you provide, do you have 2, are they tight (all side touching is body) and identical? He has a hide rock, small herp branches (he hides and climbs in) and a hallowed out log. Different sized hide spots and tons of places t not be seen and blend into.
Do you provide belly heat? That would be the underside attached heat pad.
What are your temps (cool and warm side)? Cool side is about 70-75 and the warm side is 80-85
What is your humidity? Between 30 and 40%
What type of thermometer/hygrometer do you use (dial,stick or digital?) Dial
How often do you handle your BP? Always handled him a lot before he stopped eating. When we moved and we first saw the sign of fasting we stopped handling him all together (to try and de-stress him, he seemed more stressed at trying to push his way out of the tank than normal after about 6 months of not handling him so we started again. Normally it's about 5-10 minutes once or twice a week and he seems happy as a clam.
Is your enclosure in a low traffic area? Extremely low traffic, they have their own room with a door that is closed all the time unless I am in there working on some artwork. Unfortunately not that often.

Some other info...
Before he stopped eating he was eating once a week every sunday. He would have a med. rat and act like he was starving the very next week. He was growing very fast but staying lean, no fat pockets or oversized girth. Very active, very friendly boy.

The alt food sources were reccomended by our vet to get him to eat ANYTHING at all. I had the unpleasant task of knocking the little critters out or snapping their little necks to keep it safe as possible.

No feces has been passed so no fecal analysis has been done.

The vet did not do a vent swab but did treat for intestinal parasites in case he had any.

No he is not housed with any other snake.

We have has him for the last two years and he has only stopped eating the last 11 months.

We have tried to 'force feed" him, to where we opened his mouth and introduced a fresh kill of a small rat (to make it easier for everyone involved) into his mouth and tried to coax him to eat and that went over like a lead ballon. He spit it out with the head half way down his throat and coiled around my arm and burried his head in my shirt.

Any other questions I will be happy to answer to the best of my ability to assure that I get to know what's going on with our little man. In all honesty he acts like he is afraid of the prey. Doesn't want anything to do with it and will high tail it in the opposite direction once he catches a close whif of it... I have NO idea what is going through his thick stubborn head.