A 100% and hassle-free solution to urine burn patches on your lawn & shrubs. Dog Rocks placed in your dog’s drinking water will begin to filter out impurities such as tin, ammonia, and nitrates. These impurities are usually passed out through your dog’s urine and can result in urine burns on your grass. Dog Rocks is vet and pet parent endorsed with over two million packs sold worldwide. Results can be seen in 3-5 weeks and there is no change to pH balance of your dog’s urine.