Pinkie mice are way too small for an adult sand boa, and they have zero nutrition basically just water and fat. Snakes need the bones hair etc for a complete diet. I'd suggest switching to fuzzies asap and trying to make your way to a small hopper, especially if you are feeding every other week. That could also help with the climbing behavior, the little dude is probably hungry
Sent from my SM-G950U using Tapatalk