Chapter 7! Opening, of course, with a new mishnah: Still, with regard to bird offerings, with all the proper details of a sin-offering for the offering to be valid. And then cases that changes an element, such that the sin-offering is incorrectly offered - whether in procedure or intent, the offerings are then invalid -- though not judged for karet. And likewise, the same review for the bird burnt-offering, olah. Also, another long mishnah - with a shift to focus on dead body of the bird, and when "nevalah" - the impurity of the body of a dead animal - might kick in, or not - because the offering does not carry that kind of impurity, or shouldn't, depending on the terms. Going back to me'ilah - the misuse of that which has been consecrated. Plus, can there be misuse of a bird olah, as consecrated? It's a machloket.