Zevahim 3: No Changes, No Transfers

If an offering is brought in the name of a different purpose from its originally intended purpose, it may or may not be fit as an offering. With comparisons to other arenas of Halakhah, specifically with regard to containers and the laws of purity and impurity. Also, an in-depth consideration of "change" - what happens when the owner of the offering is the change, and not the purpose of the offering itself? Why can't the offering be transferred to another?