I have a camera mounted on the inside corner of a 4' chainlink fence and it's failed twice. When the first camera failed (less than a year old), I presumed it was a fluke or maybe our small dogs were pawing at it and the vibrations killed it. I moved the new camera up out of reach at the same location. After a few months the new camera's image would fog and then clear after a while and finally blacked out as the other one did. I don't know if this is just bad luck or from the camera location. I don't think it's dog related, and the odds of it being a coincidence are extremely high. No problems with the other 15 cameras.