I have written before about dog urine on grass. I told you I would let you know when I found a product that I can recommend for counteracting the damage dog urine causes to grass. The product is "Grass Revitalize for dog urine" from RemoveUrine.com. It is a microbial product that breaks down the excess nitrogen in the urine. You spray it on the grass and lightly water it in. Two to three applications a year. It helps and strengthens the grass in several ways including effectively dealing with the three reported issues with dog urine.