Help Getting Rid of Biting Flies

I have kinda avoided posting in this thread, as I have very little experience with dogs. But I am petty good with insect control. The best thing I could recommend would be "no pest strips", particularly the original vapona type. Hang them in the area the flies are affecting, but high up enough your dog(s) can't touch them. And if you can.get the original vapona type, use gloves when handling them.

There is a newer version manufactured by Hot Shot, but they don't seem to be as effective. The old school vapona, with the active ingredient 2,2-dichlorovinyl dimethyl phosphate, was the best weapon I've ever seen on flies in an outdoor open area.