I've had hell night every night of this month. 2 bats in my walls. First bat found his way out of the wall into the house and out my open kitchen window. Bat #2 either stubborn or stupid. He was rattling around in the walls, heat vents, furnace. I kept waiting for him to come out from the walls..... the noise finally stopped 4 or 5 days ago. But no smell. Can you imagine this guy hiding in my walls!! Those bats were like maybe 2 tater tots at most.