Before Ruff Greens Tana's Poop was highly variable, sometimes hard, sometimes very wet and runny. We tried various supplements which were less expensive. We finally decided to go the extra mile and buy a sample pack of Ruff Greens and the results were immediate. Dog Poop was Dog Poop. Have been using Ruff Greens for over 1-1/2 and will not stop. You can buy very expensive dog foods and try a lot of supplements, but Ruff Greens is the best for your dog in our experience.