Using Dog Rocks is super easy. First, take the Dog Rocks out of the bag and give them a good rinse. Then, fill your dog's water bowl with 2L of water. Add the rinsed rocks to the water bowl. One 200g bag of Dog Rocks will work for up to 2 months in 2L of water. These rocks are safe for all household pets, so there's no need to worry about any health issues. Just make sure to keep the water bowl clean and change the water regularly. And there's no need to give your dog any tablets or treats, as the rocks do their job right in the water bowl.