A few weeks ago my cob mare (only has a bit of feather) was showing all the signs of feather mites - stamping, biting at feet, rubbing legs together. HAd a crusty area in feather on 1 back leg. Spoke to vet - advised frontline on all 4 legs, to above the knee & hock, 2 treatments 10 days apart. I've done this but my mare is biting at her belly ( has 2 large bites on 1 side) and also at the tops of her front legs (has 3 bites in this area). She has had a bad few weeks with itching, she has sweet itch too, but at my current yard has had no problems for 2 years. So I am now wondering if the mites are causing the itching & biting. Vet has told me I can use frotline all over, but I was wondering if I do her belly, could I clip her belly first to make sure it gets right to the skin. Obviously I am going to avoid any sore bits. Has any one else had a problem with mites moving up the body?