Lol yes I'm south of you - he sounds like a typical 'allergic to Florida' horse. I've been through the rigamarole with my gelding, so let me know if you need any advice. First things first, as you already know, get him into his own private stall ASAP, under a fan, night turn out only once it heats up.
Pyrannha shampoo is great for keeping bugs off, but you'll want a sheet with a belly guard now that we're getting into rainy season, fly boots and a neck guard too. Worming is essential, you might want to look up neck thread worms and see if treating for that helps with his itchiness.
Has he always roared? I might have missed that. My allergy guy was a horrible roarer, to the point I was considering euthing. It was also while he was having non-stop allergic reactions to everything, had stopped sweating, etc etc. He wasn't like that when I got him, so it was very frustrating.
It turns out that the barn we were at was what was causing the issues. Very dry and sandy (good for fla sores, bad for allergies), and the stalls faced east/west. In Florida, stall direction is a very big deal - if it gets full sun once a day during summer, that can be enough to shut a sensitive horse down.
Now that he's elsewhere, his breathing is about 98% better, he sweats, and he's much less depressed. He gets more Florida sores, but I've have a good worming regimen, so combined with daily grooming and checking over he does ok.
Sorry for the novel, but I had to figure it all out for myself so I know how hard it is!! Good luck, those kinds of horses are expensive and take a lot of time on a daily basis. Let me know if you need anything.
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Last edited by bubbleslove; 05-15-2013 at 04:36 PM.