This morning I saw that 4 of my ewe hoggs had rubbed away a strip of fleece at the tops of their tails. They've not gone down to bare skin, but the last year's growth has broken off, leaving them with a sort of short 'tyre-track' effect across their backsides. It's only in that spot and having watched them for a good while this morning, they don't seem to be itchy at all.
I'm inclined to think that it's just a combination of a surprise hot day yesterday in full fleece and being moved into a field with an old wooden gate with a bar at EXACTLY the right height for scratching your bum on if you're a ewe hogg the day before, so am just going to keep an eye on them for the next day or two, but if they do start rubbing away fleece elsewhere or show signs of itching, what's okay to treat them with, given we'll likely be shearing in 6-8 weeks? Ticks would be most likely, as we've got deer coming through almost daily at the moment, but didn't see any on them when I had them in for dosing a couple of weeks ago.