Oh Jen you must be worried sick, I know I would be. Yesterday I went to check on the little BCI and he wasn't in either hide or in clear view. I nearly had heart failure till I realized the little poophead was just buried under his deep substrate. Dang snakes!

Hope you find pretty Sienna very quickly. Anything that looks far too small for her to have gotten into...check. I know folks that have found them in their shoes, behind computers, in bookcases, etc. We had a member here that lost two snakes. She left their tubs open and easily accessible and they showed up back in them. Maybe worth a try.