The flies are out early this year because of the early warm weather and mild winter. Beginning of May is too early for fly masks and fly spray in my book, but I'm putting them on nonetheless. I've never seen the biting flies out this early.
I have the biting horse flies but these are the huge horseflies. I stand out in the pasture and swat them off the horses then step on them but I can't be out there all day. The other 2 horses are dark so I can't see the blood but the Buckskin has streaks of blood all over him.
Don't know how to get rid of them. But I would get fly sheets, masks and tons of good fly spray. The little black flies make my girls legs bleed like crazy so I feel your pain. Fly spray has worked pretty good for her so far but when they get worse she will be as covered up as I can get her. Posted via Mobile Device
I built a contraption called Manitoba Fly Trap. A black swinging ball suspended in the middle of a pyramidal shape attracts the flies, which circle the ball then fly upward to the area that has plenty of daylight. I noticed that a type of sparrow was going in there and feasting on the flies. There is a trap up top but the flies never got that far as they were easy pickings for the birds. OK you don't have a trap. Go to your local mechanic and ask for some dirty engine oil. Wipe it on the chest, neck and legs, with the hair, don't rub it in. It's dirty but most effective. Before using it, leave it sit open for 24 hours. Be sure to wear old clothes. When flies are bad like this the horses need to be able to get into a dark shelter, a very dark shelter. The flies won't go in.