Dog Rocks - Save your Lawn. Dog Rocks 200g will help stop pet urine burn patches ruining your lawn, grass and hedges. One pack of Dog Rocks in your dog's water bowl will keep your lawn in tip-top condition for up to 2 months. Dog Rocks are the only 100% natural and convenient solution proven to have no change to the pH balance of your pet's urine. Features: 100% natural Lasts 2 months Convenient Non-Medical - No change to pH balance of pets urine Safe for all household pets No need to ingest a tablet, chew or treat Intended For: Dogs Includes: 1 Bag, 200g Health Consideration: Safe for all household pets. No change to pH balance of pet's urine. Use: Home and Yard Treatment Total Weight: 200g Dimensions: 9.06 in x 3.34 in x 2 In Ingredients: 100% Natural Paramagnetic Rock Directions: Remove the Dog Rocks from the bag and rinse. Place 2L of water in your dog's water bowl. Add the rinsed rocks to your dog's water bowl. One 200g bag of Dog Rocks will last for 2 months in up to 2L of water.