Unexpected house guests can become an issue with winter weather and the drop in temperatures.

Wildlife expert Marcus Mueller says mice and squirrels are looking for a warm place to be.

"An animal is looking for that shelter. Different animals require different shelter needs. A squirrel is looking to build a warm nest. Bats are looking for a place over winter, like our attics."

Sealing any possible entry points is a good way to keep them out. Store your food in air-tight containers and remove any clutter that could provide a nesting area.