Description:
Dog urine has a very high nitrogen content, and tends to have a high ph level as well. If you frequently use a nitrogen-based fertilizer, you will have a more noticeable problem. The concentration of nitrogen in one spot is too high, and as a result, the grass dies, while an outer ring seems to flourish.
Control:
There are food additives and supplements available that neutralize the acid in your dog's urine to help prevent grass burns but, altering the ph level of your dog's urine can lead to serious consequences.
It's a far better idea to treat the grass, rather than the dog when trying to avoid the urine burns on your grass. Frequent watering, or, even better, soaking the grass the grass after your dog has eliminated, will help prevent the burn spots from appearing by watering down the nitrogen from urine.