I am making some progress on eradicating the mice in my ceiling.
I am not wild about poison because the corpses are not recovered and they smell as they decompose. Also, if the mice die in the summer we often get a follow-up infestation of enormous flies. The progression of plagues is almost Biblical.
But I am desperate.
I was using our bathroom the other day when I noticed tiny shreds of paper fiber on the floor. It was immediately below the bathroom vent.
Removing the vent cover I saw the classic Tom-and-Jerry mouse hole indicating that the space between the blower and the vent cover is now part of the mice's domain.
Four ounces of Diphacinone bait-blocks were loaded into the space between the blower and the vent cover.
The mice have been all over those blocks, like flies on 'tater salad. I have to sweep the bathroom floor every time I go into the bathroom least I track the evidence out into the house.