Long story short, after three months of diagnostic testing and feed experiments, vet believes new boarder has allergic dermatitis, most likely feed based. We figured out pretty quickly that she was allergic to flax and she improved somewhat when we removed that. Had serum allergy testing done to see if there were other clues. (I know it’s not hugely accurate but it was a place to start.) Looking at the results and focusing on the things that scored positive over 200 - no surprise flax was the highest. She also came back highly positive for oats and cottonseed. The added complication is that her owner says she’s highly sensitive to soy. A little is okay but too much and her estrus is really unpleasant and she gets pretty cranky. For now she’s on a forage diet with V/M supplement to see if we can get this under control. Long term, I’m not sure if this will work. I’m not opposed to the idea but hay testing isn’t an option. I don’t have enough storage to take delivery of more than 6 weeks worth at a time. My hay supplier has good quality mixed grass but I’m not always getting it from the same load. I’d feel a lot better about forage based if I could get the hay hay tested to balance v/m.
I’ve been searching for a feed and/or RB that is oat/flax/cottonseed free with little or no soy. I love flax generally but it seems everyone is adding to their feed. Great for most but not if you have a horse that’s allergic to it. And oats are pretty basic too.
Any suggestions would be most appreciated. TIA