All fall and winter my youngest dog, Boris, has been chasing mice in the laundry room. At least he is convinced there are mice in there, and he climbs up the metal rack in there and knocks things down, barking at the infestation. He is convin eeed2 u mIt isn't in his head. I saw one once and they ate everything edible in there. Now the laundry room is outside of the house proper. It is in that glass room with the furnace beside it. The door to the outside is 2-3 cm above the door jam so it is easy for the mice to come in. To enter my house there is a very snug fitting wooden door. Itis not always closed when I am home but it is when I go out until this week. This week I baked some food so I opened the door and put a fan in front of it and several others too blow cooler night air through the length of the house. I sent to bed with the wind blowing out of the back door and I completely forgot about the possibility of mice entering the house properly and making themselves at home.
So I am a little hesitant to do anything. I guess I will wait for proof they did get into the house then keep the dogs corralled and set traps. I really prefer the old mouse traps that are spring loaded. Peanut butter in them, not cheese, forces them to lick it and catch them. I am not squeamish with these traps. I had to clean them out in our chicken coop at home because the mice loved the free chicken feed but my Dad didn't like paying for their food and at one time there were quite a lot of them, so I was removing dead bodies every morning. I believed that the smell of the dogs would keep them out. Only time will tell.