Peterals is an all-natural solution to grass burn patches created by your dog’s urine. If used correctly, once added to your dog’s main water source, these burn patches should visibly diminish or stop appearing within 4-6 weeks of using Peterals. Peterals works by actively filtering your dog’s drinking supply. Peterals is not a medication, and does not alter the pH balance of your dog’s urine. When these instructions are followed correctly, there are no known side effects on dogs from the use of Peterals. If you are in doubt, or if your dog has a pre-existing medical condition, please consult with a veterinarian professional before using Peterals with your dog.