I am at my wits end with people letting their dogs walk through my lawn. Not to mention letting their dog pee and poop and act like my lawn is a public park. The problem is I live by a popular park and my street gets a lot of foot traffic heading to the park. I am getting ready to resod my front yard and do not want to go to jail because I shoot the first dog-owner that lets Rover enjoy my yard. So...I have been looking at those solar powered ultra sonic animal repellants. You know, the kind you stake to your lawn. Anyone have experience with these? I have read some reviews, but they are all mixed. People either say they work great or don't work at all. Any advice on a reputable brand or even an alternative to these things. I was also thinking about those motion detected sprinklers, but i hate to leave the water on all the time. Please HELP!!!