German Shepherd dog

citronella works well i put a few drops in a bucket of water and swill down..good for fleas too!!

in the kennels i use tones of fly paper (20-40 peices) this is fine until the dogs manage to pull them down...it took ages to unwrap them..lol

some plants discourage them but i cant remember the names 

good luck!!

sorry i am from the uk..lol  hose down i use a pressure washer with a detergent tank 

I have been using Odo Ban for 5 years....buy it at    Sams   and dilute it gallon at a time.....no flies no ants....you can even use it in ant hills to rid of fire ants.....

I have an insect light in three places up from the kennels and by my well house....I do not have or use odo ban on my back or front patios and I have flies during the warm months.....so Odo ban works...this year I will use Odo ban on my porches and spray my decking with it.  I use  Odo Ban for cleaning the puppy kennels , in the nursery ,,the barn and in washing tennis shoes and spray the bed of my pick up when I load garbage sacks that seem to leave odor behind.....no flies on garbage as I spray them down with Odo Ban also...

keep the kennels clean, wash them down whenever needed with pine sol (or generic) and outside runs with bleach/water.  Don't let urine/feces sit at all.  Change bedding often.  Don't leave old dog food sitting out.  Clean out drains frequently.  That is the most help against flies.  I never have flies in or around my kennel, and the kennel is surrounded by horse/sheep pasture (where there are lots of flies).  I also have fans on in the summer months - ceiling and rotating floor, which also may help against flies.  Washing water buckets with vinegar may help also.  But cleanliness will do the best job.

molly

I don't know if this really works because flies are rather manageable around my property.  But here in my area people are putting up baggies with one cent pieces in water, tacked on the outside of roofs to keep flies away.  As someone explained it to me, it must be the reflection of the cent pieces in water that disturbs the flies because of the way the eyes on the flies are placed.

They say it works. . .

I spray my dogs with a dog-safe horse product called Rio Vista coat-so-soft. Its all natural, pesticide free, and it makes them smell good and shiny as well.

I personally have found going out and spritzing some weak bleach-water around the kennels and premises quickly dries and disperses all flies and also helps keep down some potential virus/etc potentially lurking around on the premises. Helps with lingering smell a little, too, not that you should have a problem with such (you can clean poo and pee but sometimes the smell still lingers).

As far as stuff to use to keep those biting flies off (especially the ears), Avon Skin So Soft bath oil does wonders plus smells heavenly! That's an ole horse trick I was told years ago. Good for the coat and skin, too! just apply it sparcely or else you'll have a messy-oily dog!

If you want something a little more commercial, you can break open a pack of the monthly flea/tick treatment (comes in the vials, usually 3 monthly treatments per pack-doesn't have to be the real expensive stuff-Hartz brand works decent for this-get the biggest sized pack for biggest dogs to stretch it the furthest) and apply some of that oil treatment to the ends of every dog's ears and rub it in to the first 3 inches of the ear tip (apply to the outside where the hair is-where the flies are usually worst, not inside the ear). This also keeps off biting flies, fleas and ticks and mites don't like it, either. I can use 1 vial and nicely treat 4-5 of my GSDs ears-it doesn't take much, but I work it in real good into the ear tips. Redo monthly just like if it was monthly flea treatment along the back.

Beware of using any of this commercial stuff if your female is pregnant. If you have an expecting female, I think the Avon SSS stuff is best and won't cause problems.