The House of Mouse

So Carrie found a dead mouse when she got home yesterday, but it was okay because it was a FIELD mouse, not a HOUSE mouse. The cats had grown tired of it when it stopped moving, but even then, she said they would walk by it every once in a while and whap it with their paw.

Evidently a field mouse is a different species than a house mouse. A field mouse is small and lean and gray, while a house mouse is fat and brown. A field mouse will move into a house during the winter to keep warm, but move back outside in the spring. They don't take up residence. A house mouse will move in and breed and infest. Of course, my question is, if a field mouse moves in and breeds during the winter, what kinds of kids will it have? And where do house mice come from, if not from outside. She said they came from other houses, but that doesn't make much sense to me.

I try not to think about it too much.

Shrug.