Just be glad you have only a mouse in your house. We moved into our house in the country 2 yrs ago. We had a home inspector tell us that there was some sort of vermin activity in a crawl space. We asked this be remedied. At the closing we were assured that the vermin had been elimated. WELL...2 months later hubby and I went on vacation to Florida and when we returned I was putting away our bags I found some chewed up papers in my broom closet. I told hubby I think we have a mouse...I didnt think a thing of it until a couple nights later, as hubby and I were laying in bed, we heard a rattling, scratching sound coming from the broom closet. After listening to me whine a bit, hubby got out of bed to investigate. He opened the folding doors and said HELLO MR RAT! I about died of a heart attack! I said you are lying! He said No kidding he went down that dryer vent, that we thought was sealed! Well, I got out of bed and drug a huge crock in from the garage and placed it over the vent. That rat was not coming back into the house. What we think happened was that the rat came up into the broom closet and if the doors were open, he would eat from Tugs bowl and if not? He we would retreat. I called the exterminator the next morning and said YOU need to get here TODAY! 95 dollars later I was assured that Willard the rat had been taken care of....I called the previous owners and regaled the story. They promptly sent a check to us and wrote a note saying that they thought the vermin was gone as they didnt hear it anymore. OMG! The exterminator assured me that it was a lone rat as he found no evidence of him ever leaving the crawl space and was coming in thru the vent...which vents into the crawl space also.
So, I feel your pain!