Ok, that may seem strange, but one does develop an odd reaction to rat's modification of objects. It sort of becomes your fault if you leave something that they shouldn't chew on in reach of their chompers. In Doctor's case, he isn't a chewer typically. He is much more interested in getting places and exploring. Lily, on the other hand, is incorrigible when it comes to chewing. She is never left unattended near fabric otherwise, she WILL make lace. She's already nibbled holes in a couple of my slacks. So, I've learned to not let her squeeze into my pants leg.
So... I will be mending the quilt on my bed. LOL