As The House Whisperer rounded the side of the house during a Los Gatos, CAhome inspection, there was a gaping hole in the house air conditioning unit cooling fins.
Upon closer inspection, the home inspector knew that there had been several pit stops by a male dog. Scent marking is a natural behavior that dogs use to mark territory and communicate with other dogs.
It turns out that dog urine which acts as a strong alkali on the AC aluminum cooling fins – literally dissolves the metal. The performance of the air conditioning system has been compromised… and will cost a few thousand dollars to replace the unit.