I have a rental property that has proven to be nothing but a pain in the butt. I get constant calls from my renters. I have this one person Sally that I especially hate and typically ignore her calls. She calls me about everything. If the driveway has snow, the toilet is clogged or if there is noise downstairs, I am getting a call. That is why her latest call took me awhile to get to. Sally called and called me all week long. I finally picked up and she told me that there were critters in the home ductwork. Critters in the HVAC ducts? Yeah, I totally did not believe her. I told her that they would eventually leave and she should not call me again. Another week went by and she called me hsystical that she could hear them chewing in the ductwork. I finally came over to see what was actually going on. Turns out Sally was right. The outdoor vent to the HVAC unit had a hole in it. A bunch of squirrels got inside of the ductwork and began to chew and make nests. I had to call an animal control company for the squirrels. I then had to call a HVAC technician to fix the damaged air ducts and outdoor HVAC unit. The whole heating and air system was basically toast. It was such an expensive repair. I blame Sally totally for this though. If she did not call me all of the time, I would have been over sooner to catch the critters.