If you're playing The Division's beta this weekend, you may come across this dog. The dog can die, if you happen to shoot it. So...maybe don't? Unless you want to see a sad dog death, I guess! Kotaku's Stephen Totilo (and Eurogamer) have verified that, indeed, the dog is mortal and can be slain by heartless monsters with no regard for what is pure and good in this world. When I reached out to Kotaku as to how, exactly, they vetted this information, the esteemed snack website simply said, "No comment."
Also killable: crows and rats.