HI Remy - is it definately not biting lice? Some of mine have had this (and we've generally had a lot of this around here) and they didnt seem to be itching, no evident wounds, just fleece falling out and new stuff growing underneath. When you look in the fleece though you can see tiny buff coloured 'bits' which look like lanolin but on longer look move! Spect you know all this but thought I'd post for Newbies like me! Was prescribed coopers 'spot on'.