Female dog urine tends to be more acidic but that said i think it's a combination of the type of grass and the individual dogs (chemistry, diet, etc). In a previous house I seeded the back yard with turf designed for athletic playing fields and such. I had two extremely large dogs at the time, one male and one female. That grass was indestructible.
I have three dogs now who spend plenty of time in my back yard and I've yet to see a yellow spot. The lawn is a combination of whatever grass was originally planted and various wild groundcovers that have invaded over the years and my dogs eat a mostly "natural" diet. Maybe that makes a diffrrence? I agree watering after potty breaks would help.