We have an 11 month old filly foal (TB) who has an itchy skin, especially tail area. This started during the winter months and although we could never find any, we washed her twice for lice (vet supplied)which has made no difference and she has been regularly wormed. I have noticed she is slow to shed her winter coat compared to her companion of similar age and am anxious this should not develop into full blown sweet-itch once the midges start to appear. She has been on a skin supplement for the past 3 weeks. Has anyone had experience of this condition and know how to treat it ?