So something as small as a mouse caused some issues with power and the internet in Bozeman, WY recently. It is really important that we keep out rodents, they gnaw on wires are may cause up to 20% of home fires.
Now not only do wildlife/animals not have a place within your home, but if you do allow them access into your home seconday pests also may cause issues. Mites, fleas and ticks and all kinds of parasites may decide to bite you instead. So the simple answer is – keep those pests out!