I have been using this product with my goats, alpacas, donkeys and mini horse. I began using it when we were having problems with our goats and finding a de-wormer that would work. Since starting the program, they have all done very well. Periodically, I have fecal samples run by the vet and she is always amazed at how clean they are. I am very pleased with how well they are all doing on this product.