Raccoons are a large animal and with that comes larger amounts of urine and feces generally all over the attic.  They can also develop latrines or areas where they go to the bathroom and these areas can quickly show themselves through stains in the drywall.  This is often accompanied by a change in smell in the house, and in certain untreated cases, we have had raccoons fall through from the softening of the drywall causing a huge a mess and expense for the homeowner.  If you suspect a raccoon has taken up refuge in your attic, it is important to act fast and call a reputable raccoon removal company in your area.