Thor: Yes, Kaiah uses his cave all the time! It's his favorite sleeping spot. Funny story, the reason I need to get him a sandbox so badly is because he thinks he can excavate a tunnel through the interior of the cave by digging at it. At least he's keeping his nails filed down, haha.
Fishbone: The smallest hook we have is about 2 - 2.5 feet long, perfect size for adults like the kingsnake, corn snake or our ball pythons. It's entirely too big for Rickey, though, we've tried. Or at least, if that IS the right size/the smallest size available, we haven't developed our hook technique enough to use it on him! Thanks for the tip, though, I'll talk it over with my boss and we can go from there.