Brown or yellow spots on are lawns caused by our dog’s urine. Most people believe that female’s urine burns the lawn more then the male's urine. Dogs urine whether male or female has nitrogen which at high concentrated levels will burn the lawn. Females squat so the concentration is higher then that of a male, that lifts his legs and pees up trees or branches.
Rinse the lawn with the hose or you could try a Pee PostThey train the dog to pee in one area which will help maintain your lawn.
Not sure if it works but there is a money back guarantee.