What is a plant that can tolerate LOTS of dog urine? I have tried several grasses that have fallen to the constant Yellow rain. The idea of training my dogs to go in a certain area is not going to happen as I have foster dogs that come and go. I am lucky to not have diggers, but they love to pee on the plants that line the driveway. Looking for something preferably that is fast growing, creating privacy and will not be too messy or drop leaves as it is near a pool. THANKS!