Squirrels look cute, but only when they are outdoors. Once inside your home, squirrels can wreak havoc. Getting rid of squirrels quickly is essential. Squirrels can chew through nearly anything with biting power of over 20,000 pounds per square inch. And they don’t require much room to get into your house. Gray squirrels can get through a hole as small as a quarter. Flying squirrels can get through a hole the size of a nickel.