I have always had my fleece binder clipped to the COROPLAST to prevent fleece burrowing. And both my girls, 13momth old marah and 8 month old Mukki have both done this- Mukki did this when she was Ill in quarantine too. I got home from visiting family the other day and my friend who was pig sitting said they had started burrowing. I came home to find them fast asleep under their fleece. I added more binder clips and moved on. Later I found them again and again and again. And again this morning. It's a 2x4 cage and I have 12 binder clips strategically placed. They have two hideys a cuddle cup and a dog bed. I exercise them every other day and hold them daily. They always have timothy hay and ab1/4 cup of pellets nightly. Filled water, always fresh. Is it boredom? I'm running out of ways and binder clips to prevent this, all help appreciated thank you