HIT + SB + PREPOSITION + THE + POSSESIVE + SOMEWHERE => POSSESIVE ADJ

Means : a possessive or ktetic form is a word or grammatical construction used to indicate a relationship of possession in a broad sense. This can include strict ownership, or a number of other types of relation to a greater or lesser degree analogous to it. 

The possessive adjective its does not have an apostrophe ('):

That bird has broken its (NOT it's) wing.

(it's always means it is or it has.)