Hi Sue H,
It is not the acid (pH) that is causing the lawn burn.. it is the nitrogen which comes from protein in her food. The effect you are seeing is similar to what happens when you dump too much lawn fertilizer in one location.
The solution is to generously water the areas where she has eliminated. If you fertilize your lawn often this contributes to the problem. Consider using a diet that meets but does not greatly exceed her protein requirements so that less ends up on the lawn. Consider adding water to her diet to try to increase her comsumption and dilute out her urine. Please consult your veterinarian for advice.
