As we hiked about, could not help but notice there was a lot of trail signage, some of which advised you to not get crushed or eaten. Once back, we spent a good hour observing a group of sheep grazing right in the camp. I had never noticed before, but the sheep had horizontal pupils. Round pupils are usually associated with active foraging while verticals are typically ambush foragers such as reptiles. I'm not sure what the horizontals have evolved for outside of ambush detection, but it has made for some interesting Googling.