People may think he’s crazy, but part of psychedelics is hypersensitivity. I doubt he could actually see in the dark and smell landmines, but his brain probably recognized very small details and fabricated hallucinations based on what little he did pick up on.
It’s a pet. It’s not that uncommon in my area. Someone found a fawn without a mother, took it in and cared for it, and because it’s tame and won’t avoid humans and human infrastructure, the owners have to take extra steps to ensure it’s and others safety. Something with high vis is what I’ve seen most often. Usually paint on the antlers.