Raccoons have adapted to living with humans. They find trash cans and dumpsters as excellent sources of food, and human houses as excellent habitat. Raccoons often tear a hole in the roof to gain access to an attic, where they create mess and noise. If you have a raccoon living in your attic, it is going to make a huge mess and leave a lot of droppings. These animals are strong, and once they enter an attic, they often tear off insulation off pipes, etc. In search for food, they will tip over trash cans, raid dumpsters, and steal pet food. Raccoons are the carriers of a number of parasites and diseases that can affect humans or pets.