Do you believe that your home is sealed up well enough to keep rodents such as rats and mice out? Many of my customers felt the same way.
Rats and mice do not have a bone skeleton like humans and other mammals, but rather one composed of cartilage. The cartilage allows them to bend and squeeze their bodies into the smallest of openings, which would otherwise be impossible. Mice can typically squeeze into holes about 1/4 of an inch in diameter. Rats can fit into holes about 1/2 of an inch in diameter.
Rats and mice are excellent climbers, swimmers, and even jumpers. All of these abilities, combined with the fact that rats and mice only require tiny openings, allows them easy access to most homes and structures.