During a Los Gatos home inspection, the inspector spotted a gaping hole in the outside air conditioning (AC) unit.

Upon closer inspection, the 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 acts as a strong alkali (corrosive substance) on the AC aluminum cooling fins and literally dissolves the metal.

The performance of the air conditioning system was compromised and cost a few thousand dollars to replace the unit.

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