Originally Posted by PatriceJ
Henry, dear, Henry.
make very sure it's her fault before you accuse her. my house usually looks like a bomb went off - in every room - but i don't have mice. how old is your house? are you sure they didn't find lots of inviting openings they can use to come in from the cold?
maybe it's the house. but, if it's been checked over by professionals and they've confirmed it's the roomie, toss her out. she's not a friend if she risks your health rather than pick up her mess.
The house was built in the 1970's. We have never had a mouse problem before this winter. I had a professional come out and look the house over and he said that room was an invitation to them to come in because of the dog food that is all over her room. ( Her dog doesn't eat from a doggie dish)