I took my two miniture daschunds out this morning to do "their business". We have a large yard (over an acre) with lots of trees and backed by a hill on one side and a field on the other. I was standing just outside our front door and the dogs were about 3o yards away down by the trees just walking around. It was still a bit dark. Off to the side I saw something moving. It was a coyote sneeking up on our dogs aboat 15 ft from them (it's happened before). I pulled out my 445nm laser and let him have it. :gun: It really freaked him out. He took off headed for the field. By this time the dogs also saw him and wouldn't you know it - they started to chase him - dumb dogs. I finally got them back. The coyote was standing in the middle of the field just watching me. I illuminated him again and he took off like a bullet - did not like it. It obviously did not blind him, but he certainly did not like it. It proved to be very effective.