Catching a squirrel is hard enough, but when the intruder has retreated inside a wall, apprehension poses all sorts of additional problems.
Why Are Squirrels in Your Wall?
Squirrels generally inhabit homes in order to raise families. Not only are squirrels notoriously difficult to catch—even for experts—but when you catch one adult, there are probably several youngsters nearby. This is especially true if it is late summer or winter.
If you catch the mother before the baby squirrels mature (around 4 weeks old), they will likely end up dying in the walls. This will create an odor that will be nearly impossible to get rid of.
If you want to get a squirrel out of the wall before calling an expert, use a live trap designed especially for squirrels. Buy or rent your trap, and make sure to check whether or not you need a permit to trap the squirrel. Most traps come with instructions for operation.
Watch your intruder squirrel to see how he/she enters and leaves your home in search of food. Place your trap on a stable surface near this entrance. Do not try to hang the trap.
Once you capture your squirrel, wash away all squirrel smell with a strong solution of ammonia and water to keep other squirrles from moving in. Then fix the entry hole. Relocate the animal at least 5 miles away from your home before you release it.