My dog went through a major surgery to remove three big lumps out of her chest. After the surgery, we knew she still had one more lump, but two more grew, and her chest seemed to be swallowing it, so I took a chance on this product. After a couple of months, my dog swallowed it down, and the lumps felt rounder and a little smaller; I believe it needs a little more time to see more improvement, but the product is doing its job, and we love it.