An equine gastric ulcer therapy composition comprises a pre-packaged, dry feed supplement comprising effective amounts of chamomile tea and an effective amount of slippery elm with effective amounts of apples and a natural sweetener. An alternative composition comprises a pour-able aqueous solution of an effective amount of chamomile tea and an effective amount of slippery elm, wherein the solution has a viscosity of at least 100 cP at about 20.degree. C., or about 80 cSt at about 25.degree. C. A method of treating equine ulcers comprises a regime of Omeprazole for an initial treatment period followed by treatment with the described nutraceutical equine gastric ulcer therapy composition.