We rented a furnished place for a while. The bedding provided was full of ancient feathers. My wife is moderately asthmatic and this proved to be way too much. She went to the local doctor who appeared to be familiar with the problem and wrote a prescription for an impressive looking smoke bomb. We lit the touch paper and left the bedroom door closed for a couple of hours. To our horror, when we opened the door, the cat strolled out. Happily, she appeared unharmed.
We stuffed the bedding in bin bags and dumped it in the ancient armoire and went out and bought our own. No idea what was in the smoke, but it appeared to kill dust mites, while being harmless to animals. The only time I have, albeit involuntarily, tested a product on an animal!