SueSew

I pinned DS's twin-size quilt sandwich and laid it out on the sofa so it wouldn't wrinkle before I got the machine back from repair and could quilt it. That was Saturday. If was fine last night. Tonight I came home from work and found the entire long-side lower edge had been attacked and batting ripped out all ragged.

Can you see from the pictures? The whole length is torn up. Must have for a been a whole mouse hotel.
What to do? I can't quilt it because not enough batting, and I already trimmed the sides to 2 1/2" all round. Can I carefully unpin and try to attach another piece/pieces of batting along that edge?

Does Joannes have something to tape together batting? LQS?

Appreciate any advice
thanks