Neither one of my chi's burrow. At least not yet. I've given them blankets to lay on but they just lay on top of them. Khorra will dig at her bed in the corner of it. I was thinking that maybe she was trying to burrow in it, but I'm not sure. They also have a snuggle sack, but they just lay on top of that as well. I kinda wish they would burrow though. I know it's so cute when they do!