hi folks when we had the horses. of to the tack shop to buy all the best so called best stuff on the market .to treat them for all insect bites.then a friend of ours from australia.came to stay with us ..and told us we were wasting lots of money.and over the summer that use to mount up ...what.. you need is this .....boil 2 pints of water .add tablespoon of citroneela oil ..tablespoon of eucalyptus oil ..tablespoon of parafin leave to go cold ..transfer it into spray bottles ..bobs ya uncle ..worked great for the nags ...worked even better on humans . still spray it on my arms and legs .i dont mind the smell .sooner put up with that .then them gleg and horse fly bites