Was watching one of those sort of horridly-fascinating shows last night on TV that is about
hoarders, except this one is about pet hoarders. They visited a couple's house who had 24 cats. The vet who was talking to the couple and she went into the room where the catboxes were, and commented on the smell, and she had handheld meter that she set down on the floor. It measured ammonia in the air.