University of Florida, Institute of Food and Agricultural Sciences Extension outreach is a partnership between state, federal, and county governments to provide scientific knowledge and expertise to the public. IFAS Extension is a federal, state, and county partnership dedicated to developing knowledge in agriculture, human and natural resources, and the life sciences and to making that knowledge accessible to sustain and enhance the quality of human life. Dogs can be wonderful companions and guardians, but they can also wreak havoc on lawns. Dead spots from high traffic and animal waste can quickly ruin a green lawn. Understanding how pets damage lawns can let you easily find a solution. Pet waste, urine especially, is a major culprit of lawn damage from dogs. Turf damage usually appears as greener, more vigorous patches of lawn or brown dead spots surrounded by a dark green ring of turf. This can look similar to brown patch and dollar spot, so it is important to monitor animal behavior on your lawn to determine whether the problem is due to dog waste or lawn disease. Some urban legends have been passed along that say the brown and dead spots on lawns are due to pH levels in dog urine and suggest various diet modifications to change this. There is no scientific evidence that this is the case. The damage done to lawns seems to depend on urine concentration and nitrogen content. When dogs urinate on grass, they are dumping concentrated nitrogen and soluble salts onto the turf.