I have two ferrets that we've had about 2 months now. They are about 2 years old. When they are out, they are allowed to play in the kitchen, living room, and one bedroom. These are the safe areas for them to enjoy. I have a board up blocking the hallway to keep them from going to unsafe areas-the bathroom, etc. The problem is they obsessively scratch the board, and wall trying to get down to forbidden zones. They've scratched the paneling off the wall doing this. I'm thinking of putting sandpaper up to cover the area, but how do I make them stop altogether? I've tried re-directing, spraying with water, and picking them up and firmly saying "no". None of this has worked. Help! Thank you for any suggestions you might have. They have cupboards galore, furniture to climb on, a bedroom to get lost in, a ferret jungle gym box, assorted grocery boxes, dogs to harass, a tunnel, and litter box containers to explore with treats. Still they want past the barrier.