LOL your gonna have a big dog... its bound to happen unless you own acres of land... i had a pristine lawn this past summer, but i decided that the dog takes precedence so if my back yard looks like crap (not literally) so be it, the dog is more important to me than the lawn which they do make spot fixers that grow pretty quick to get some of the dead grass... one thing ive learned is spraying ammonia in one spot and he seems to favor that spot.. or after each time you clean you can just spray it with water to saturate the area and have a better chance of the spot not dying