Thanks for your input. The stable owner found a feed that she said had no soy ($35 a bag!) but she said it is just about impossible to find anything without soy now. She is accurate in that account because I wrote to feed companies who confirmed it and said the best bet was to find a textured feed without soy or go to whole oats with a ration balancer. Lo and behold, the ration balancers consist mostly of…you guessed it…SOY. My mare’s neck also will break out in hives that come and go. It could also be a reaction to the feed. It will be interesting to see if she clears up with her change of menu. I was wondering if anyone else has had a mare with a similar problem?