Shabbat 52: An Unruly Red Heifer

Animals in the public domain - what can they wear, what counts as "carrying"? We focus on the parah adumah, the red heifer, and today what extent wearing some bridle, bit, reins, etc. would invalidate its status as a parah adumah (or what it doesn't). The means to control the animal does not "work" the animal, which would invalidate it. Also, questions of definition with regard to Shabbat, as compared to tumah and taharah - rings, and their function, their composition, etc. Plus: observing the range of the topic and pace and process of the journey of the daf.