I have a 5 year old black mare, who is unable to cope with flies and midges. At this time of year, a little warm weather brings out the midges and she will disappear into her field shelter. She is rugged, but still manages to kick at her belly to the extent that she eventually breaks the belly straps, so it clearly distresses her. She also makes a big song and dance about being sprayed with repellent, so its not easy to deal with. I wondered if putting a garlic supplement in her feed would be effective or if anyone knows of a similar treatment. She is in foal, so I have to be careful what I give her.