It's like you guys know me! When I first discovered the mice, at the start of last year, I was in love with "it". My husband said, "them". I said, "I've only seen the one, and he's adorable..." He said, "If you have one, you have lots." He turned out to be right. As usual. But back then, I didn't know this yet, and I thought my pet mouse was cute, and I fed it digestive biscuits, because I don't like the things, and the mouse was so cute and looked hungry. My husband laughed at me.
But then we started having issues with food storage and contamination. That's when we ripped out our old kitchen (full of nests of chewed up paper and debris that they'd been collecting for years).
Anyway, I thought we had it all sorted. We have heard quiet scratching and rustling, so we knew the mice were still in the house, but they seemed to be keeping out of the food until the last couple of weeks. I'm not sure what changed... they found a new path up? They lost an alternate food source and have had to get more assertive? I don't know.
But we can't have a cat because I'm allergic, but my husband is allergic to the point of misery. Plus, then we'd see the poor victims... :/