Shapeshifting isnt something I usually do Consciously, it has happened to me on several occassions though. I do and always have had a very good connection to my Animal Nature as well as always having a very good relationship to other Animals, both Domestic and Wild! You see evidence of this in other Posts Ive made.
Firstly I have spent a lot of time in various Animal Forms in Meditation, these are with my Power (Totem) Animals.
On one occassion during a very deep Healing Trance, in the company of 2 Witches, I also went through a series of Transformations, witnessed by them to some extent, which concerned but fascinated them.
I want to stress at this point that as a Spiritual Healer extensive experience, this sort of thing is similiar to Channeling Healing Energy or even Spirits to assist in my Healing work, i often have Power Animals assisting me with this, so is very Natural for me and I remain in Conscious Control at all times, only choosing to take a back seat and Observe.
On this occassion though I went through a total transformation into a Wolf, from the feet up, the energies were incredible, I could feel things moving in my body, from outside I dont think I underwent any Physical Changes though my friends did look concerned, they were conscious of something happening, they just werent sure what.
However when the energy reached my head, I suddenly became aware something was very wrong, the Wolf working through me was either Ravenous or Rabid!
I didnt like this and decided at this point to take back control, but the Wolf resisted and I had a struggle with it!
Eventually I won, but I was totally Knackered!
I later associated the experience with my new girlfriend, another Witch, she was consciously working with Wolf Spirits a lot, they also work with me often, which is probably why I realised there was something wrong.
She turned out to be Bolemic and a Speed (drug) Abuser, she was also going through a lot of emotional issues, I wasnt aware of this at the time, as we were new to each other.
I suspect it was a cry for help from her Wolf Spirits to me!
Anway that got sorted eventually.
On other occassions i have partially changed, these occassions used required me to in order to help a situation developing around me.
On one occassion at school, it was Sports Day and I was walking up the field having just finished an event, a friend of mine was jogging towards me to his next event, I was suddenly urged to look up, as I did I saw a Javelin being blown off course and heading straight at us! I rugby tackled my friend and the Javelin landed 3 '' away from my leg. This may not seem that unusual, but I wasnt wearing my glasses and would normally have had no chance of seeing the Javelin, which I saw with perfect Clarity, this was the Eagle working through me.
Another occassion there was an accident in a Garage Workshop I worked at, this involved a car falling front (engine) end onto a mechanic, which would have crushed him, I say would have because it didnt reach him, I was standing near by, saw what was going to happen and without thinking just held the front of the car, he crawled out and I let go, CRASH!
It wasnt until after this we both looked at each other, in a 'what the hell??' sort of way. Obviously under normal circumstances I cant do this sort of thing! Bear Spirit.
Obviously, I dont speak of these sorts of things often!
My training if any, to improve these sorts of abilities, comes from me being mainly in close proximity to various Animals and associating with them as though they are Human, I guess, I basically assume they understand me, is the easiest way of putting it!
I have worked in Zoos to get to know the Physical Counterparts of my Power Animals better, and had some very humbling experiences as a result.