Animals are great about that. excellent early warning systems. My cat always disappeared when the old In-laws were coming by... lol. Also had a Boxer (Bully Breed, a friend of mine owns her) warn me of a Cougar that was stalking us last time I was up Old Stage Road. She was running ahead of me on the leash, then suddenly pulled in close and stayed there, tail between her legs. He never got close, especially once he knew I knew he was there, but MAN did my adrenaline spike. I really need to keep my camera on me when I'm out there. All the cool stuff happens when I'm ill prepared, and I know it's "Pics or it didn't happen", lol