If YOU don't saturate your dog's pee with water..
this is what WE have to do:
1. Rake the patchy areas to remove as much dead grass as possible.
2. Apply a layer of extra-fine ground limestone.
3. Water the area to help the limestone absorb, then let it sit for a week.
4. Cover the patches with top soil
5. Sprinkle grass seeds over them.
6. Water the seeded area regularly.