AT the risk of sounding like a complete bottom kisser, Dawg is absolutely right here. If they have mites already you should still dust the coop and everything. I didn't and got away with it, I THINK. I could be wrong.
Well if you're gonna bottom kiss....Dawg's is as good as any....LOL Sorry Dawg....couldn't resist. I too prefer seven and I only use it if I feel invisible creepy crawlies on my arms a few minutes after handling a bird.
sharon