Dog Rocks are one of those products that seem to good to be true, but this product is True. So what are Dog Rocks and what do they do? Dog Rocks are basically a type of natural rock you put into your dogs water bowl to stop there urine killing your grass. I know what your thinking, yeah right i bet that is a crock. But these really do work and they work consistently for 2 months at a time. They wont bring old dead grass back to life but they will stop your nice lawn from dying when your dog decides to pee. If you have this problem at home its sure worth a try as the Dog Rocks are not harmful at all.