I live on the edge of a conservation trail, and lots of people go through it with their dogs off lead (it's 550 acres of trails). Our coop and run have circle marks in the dirt around it from dogs running around it in circles! And claw marks on the side. I used to be nervous about the hawks, raccoons, or foxes, but now it's people's dogs. I looked out the window this morning and there was a Great Dane ON TOP OF THE COOP! It had jumped up on the egg boxes and was on the roof. It knocked off a few shingles too, and I am super mad. The girls are safe while they're in the coop, but I want to let them out, and we don't have any fencing outside of the run yet. Sometimes people are there and I plan on addressing it with them, but this dog ran right back into the woods, and there was no person around, no car parked, etc. Is there some sort of high pitched alarm I can set off when I see a dog near the coop? Some sort of spray or something? I am BEYOND angry that someone's unattended PET could kill my girls. A wild animal is one thing, but someone's off lead dog is making me see red. Any suggestions? Is my only answer a chain link fence or keeping them in the run? Neither are first choice options for me. Thanks in advance!!