Thank you guys for all the suggestions!
I've tried a flysheet on her before and the neck hole kept getting caught behind her withers and pulling hard in the front. It was a 72" and she needs a 69 or 70 so that could have been the issue.
I wouldn't be surprised if she was scratching her butt in replacement of another spot, actually. Now that you mention it, every summer she does get a circular crusty fly-ridden spot in the very center of her belly that's EXTREMELY itchy to her (she will literally fall over if I scratch it, haha!) so maybe a flysheet with a belly band would help with that.
She's not so much scratching her tailhead as she is scratching her butt and her tailhead is sometimes side effect of that butt scratching.
I have used Avon Skin So Soft on her last summer (in a mix with other stuff including vinegar etc) but it seemed to wear off in about 20 minutes. When the flies are back I'll give it a try full strength, maybe that'll be the ticket. Then she can be an old lady horse that smells like an old lady!
There have been fly sprays that seemed to work really well at keeping the flies off long term but, in Lacey's world, long term is like an hour, I worry about all those pesticides and stuff in those heavy duty sprays, and they're SO expensive to be spraying all over her body every hours or so... It's a quandry.
I've also had better luck keeping the flies off when I was feeding her 1/4cup apple cider vinegar everyday so I plan to do that again this summer.
I'm not super keen on MTG so I probably won't try it unless I have no other choice, thanks though!
I feel bad about putting her in a flysheet all the time (btw, she LOVES rolling, whoever mentioned that :) ) in the summer, especially given that she's blanketed all winter, but if that's what helps her, I'm all for it. Once she realizes it's helping, if it does, she'll probably love it too (she ADORES her flymask for that same reason).
Does anybody have good flysheet, with belly thing, recommendations?
Also, Duffy, is a sweet itch rug the same thing as a flysheet? I assume so... :)
Tea tree oil shampoo is a great idea! I will for sure look into that.