A trick to soothing the stomach and helping with acid would be alfalfa pellets and Aloe juice. The aloe juice about a cup to two cups once to twice a day depending on how sore they feel, will help the lining of stomach but also soothe it. Our horse has had chronic ulcers and the alfalfa pellets with aloe juice after treatment of Ulcergard, has worked like a charm.
If you cant afford it Id go with ritidine, or even start her on a G.U.T- the supplement because she could be having something different than ulcers. There are numerous things it could be besides ulcers.