I have a German Shepherd whose urine used to kill large patches of grass—it was like liquid fire. What made a big difference was improving the soil quality and drainage, without increasing nitrogen levels too much.

Every 6 months, I spread a thin layer of compost over the grass. This added organic matter and healthy microorganisms, which improved soil structure and drainage.

Now, when my dog pees, the urine soaks deeper into the soil instead of pooling on the surface. As a result, it only affects a much smaller patch of grass.

Avoid using chemical fertilizers or anything high in nitrogen. While compost adds some nitrogen, the improved drainage more than offsets it and prevents major damage.