It sometimes happens that we have uninvited guests in our houses. Now we are talking not about a human, but about a rodent! Rats, squirrels, raccoons, opossums are frequent visitors when cold season is coming. When it is getting colder the creatures are actively looking for a cozy and warm place to make a nest, survive the cold and save their offspring in. The most suitable premises in their opinion can be your house: the cracks between the walls, attic, basement and home’s duct work. It is warm and safe inside. But what consequences such cohabitation can lead to?