Dog Rocks are a paramagnetic igneous rock (100% NATURAL Rock)

When this type of rock is immersed in water, the paramagnetism creates a magnetic field within the water causing a change in the ion exchange

This in turn diminishes the nitrates that are found in the water, so when the dog drinks this water, less nitrates are being absorbed into his system and therefore less are coming out in the urine. Nitrates are the chemicals that burn the grass

Only affects the water and not the dog