Poem Help (yzing a poem)?

First of all, the narrator is speaking to the object of the poem...the problem is that there is a great deal of ambiguity here. The title would suggest that the object of the poem is a wild horse, but the images suggest something else. The first stanza could be speaking to a person or an animal, the second stanza and following couplet looks like a person, but the image in the final stanza is more like a tree. Therefore I'd say that the "wild horse" is actually a person, and the final image is metaphorical in that it represents how the person shakes off that which had settled about it during a colder time, lightening its load and moving with the wind...a free spirit. The first stanza shows the preconception, how others expected the object to be, the second stanza shows that this was incorrect, and the third shows how the object is actually self-improving and a free spirit. The entire poem, when looked at in this manner, can be reflected back to the title, which also metaphorically makes a parallel statement, that of a wild horse shaking its mane...tossing off the way it was in a free manner to make it the way it wants it to be, free and easy.