To keep these animals from becoming a permanent part of the family home and yard, screen louvers, vents, and fan openings; keep doors and windows in good repair; tighten eaves; replace rotten boards; cap the chimney; trim overhanging trees; remove bird feeders or use squirrel-proof feeders; and remove acorns and other nuts from the yard. Chipmunks can be deterred by removing denning habitat, which includes logs, rock walls, and stones.