Recently I visited a good friend of mine. As soon as I walked in the door, I was hit with the smell of ammonia from cat urine. Every inch of her house was covered in an animal stench, and my asthma immediately flared up. I said I needed to stay in a hotel for the rest of the trip, saying I’d had to do that because of my asthma before. I didn’t tell her it was because her house smelled horrible. Ever since, I have wondered whether I should tell her, because it just seems incredibly unhealthy, not to mention embarrassing for her and her girlfriend. I also wonder about the health of their pets.