I have used this Equine wormer on all of our horses. I give this to them once a year. It not only helps with hard to keep horses weight but helps their coat and mane as well. I would recommend this to anyone with any weight issues in older or young horses, this stuff is truly awesome. My horse after giving this to him cause I had tried all other options gained 75 pounds in less than 2 weeks after this treatment. To look at him now you would never think he had a weight problem before.