Some owners swear by their own home recipes for fly spray. Some of the best fly deterrents contain synthetic active ingredients such as DEET or permethrin, some of which are insecticides ...
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Best fly sprays for horses as tested by owners and ridersThirdly, do a patch test on your horse with the fly repellent before you start using it in full. Leave the patch test on for 24 hours to check if your horse has a reaction. Tried and tested: best ...
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