Possible bats in the attic...
I live in an old stone carriage house. Last December, I had a visitor in my office. It was a very upset bat. I have lived here most of my life, and have never seen a bat in the house. Does this mean I have bats in the attic? Since the house is field stone and there are many places for birds or bats to enter if they want to, it'll be very hard to seal all the holes. An expert came to the house, but didn't provide proof that there are bats in the attic (guano). He gave me an estimate for $1800. Seems futile, given the stone. What would you do?