I know for boa babies and Juvies they recomend that you use hides. Most ault boas seem indifferent to hides from what I've read. My boas have always had hides apparently and will use them as adults so I provide them. From what I've seen however they don't use them. It's very hard to find boa hides on the market. I used cat litter bans from the dollar store and cut a hole in the side.

All of that information is based on my research however as I am very new to boas and don't have alot of experience with them.

Hope this helps