We used to use the
products sold by vets that you pour on the horses, but found the same
product in bulk at a feed/tack store. It's Martin's Fly-Ban Synergized
Pour-On. There is a similar product that can be used for cows, so if
you can buy this, be sure it's the Synergized Pour-On. We use a strout
plastic syringe to apply it to the horse's top line, ears, forehead and
down the center of the face a little way, and behind the lower legs
(where they can't reach it). We apply this every 2 weeks and it costs
about $2 an application. I forget what it costs at a vet's, but
remember that it's a lot more expensive than Martin's.
