I've had my Aira since August. She started shredding the pee pad in her ex-pen when she started sleeping less and getting bored. We have our pee pad on a plastic mat, the kind that go under an office chair to protect the floor, so our solution was to duct tape the pad down and spray the edges with this spray called Bitter Yuck. It's made out of rosemary extract. That has fixed the problem. Good luck
