Bekhorot 14: Private Altars

A new mishnah! Consecrated animals that acquire a blemish -- so they cannot be used for a regular sacrifice, what happens when they're then used for other things -- which doesn't rid the animal of the first-born status (or the obligation to give the kohen gifts). Note that the order that things happen (when consecrated, when blemished) make a difference in terms of the halakhah for the given animal. Also: Significantly, the Gemara rereads the details of the mishnah completely differently -- limiting the cases there for private altars, which changes the circumstances, the consequences, and more.