I'm not sure of this so I'd like someone else's input.
I have a strong spiritual connection to deer, I feel drawn to them, I even share some characteristics with them (observant, timid, will fight if needed, I naturally tend to walk on my toes and jump around while running)
Is this some form of a theriotype or otherkin or perhaps it's something else I haven't heard about yet. Any ideas?
Introspection takes time and ultimately can only be confirmed, denied, or decided by you. Maybe try past-life regressions and see if that yields any answers. Do you ever feel phantom sensations? A lot of times, those are key features of someone who has a kintype or theriotype. If you feel as if you may be deerkin or a deer therian, try researching species of deer and seeing which feels "correct". Of course this doesn't mean you aren't 'kin or therian if you can't find one, but it is a suggestion that may help in your soul-searching.