Yes, horse or horse quality hay is what you want. Hay for cattle isn't as high a quality as horse hay. Also, horses & rabbits have very similar digestive tracts. I feed my bunny girls as they are over 6 months of age Timothy or Orchard grass. I've been told Bermuda grass is good as well & for me it is available locally. Others will probably be along & can tell you better how to judge the hay to be sure you are getting good hay for your rabbit. You don't want any hay with mold or dampness. Should also smell good. Anyway hope this helps until the more experienced members come along to help you better.