Quote Originally Posted by ckuhn003 View Post
Just a suggestion but when it gets dark, can you get out a hair dryer and start heating up a mouse/rat? Maybe the smell will get his attention and he'll start to show himself.
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And if that fails, get a live fuzzy or hopper- keep in a small ventilated container & leave it overnight near where he disappeared, again, for the scent. Also leave his cage open & nearby on the floor, with warming mat- maybe you'll get lucky. Unfortunately, I cannot promise, & when snakes get too cold, they get sluggish & sleep- not what BPs are supposed to be doing. These things are best prevented...I've kept snakes for many years, & I can remember being just as unaware of the gaps left under cupboards- the only way you notice is after your snake does.

I so hope you can get him back out & I doubt that tearing the wall apart is an option. A long time ago, I had an adult bull snake get loose in mid-November & she too headed under kitchen cupboards, where I couldn't get her out; I assumed she was there, by process of elimination, having looked everywhere else. I felt guilty, I worried, but she brumated there for about 6 months just as bull snakes do in the wild- one night in mid-May, there she was, sliding across my kitchen floor, none the worse for wear! Whew! Mistakes happen, I hope that you too get your BP back unharmed.