This absurd labeling of hay by horse lovers has no basis in fact! The best hay in the nation goes to our dairy herds. Many cow herds are fed better than you could imagine!
It's not so much about the name someone calls it as what you are actually getting. We visited about 6 places selling "Horse Hay" before we found the quality that we were willing to feed our horses (and promptly bought all he had). The guy we purchased our hay from will call us as soon as he has more ready but even though we are absolutely thrilled with what we bought, we'll still go out there and inspect it before we commit to purchasing. Our one horse coliced the last time we ran out and were forced to use cubes so we buy hay by the truckload now to try and avoid the possibility of running out.