 What types of flies are we talking about that Clarifly can help with? Clarifly itself covers four flies. Typically the four flies that you're going to see on a dairy or in a confinement animal operation is going to be house flies, base flies, stable flies, and horn flies. Primarily dairy is going to see the house fly and the stable fly be the bigger issue. The stable flies will feed on the blood of the animals, so you'll see them a lot on their legs, maybe onto their bellies or backs. And then the house flies are just the ones that are