But single trappings aren't always the solution. For homeowners who want to prevent the recurrence of such troubles, experts say it's necessary to get at the source of why animals are getting in. The problem is usually a food source, or an open nesting opportunity. Snakes, for example, eat mice. Any food source left outdoors attracts any variety of wildlife, which makes it a good choice to eliminate such temptations whenever possible.
Cooper chooses to feed birds heavily, and accepts the consequences.
But openings can be patched. If squirrels are tampering in the attic, trim overhanging branches near the house.