On account of the following [blemishes] one may not slaughter either in the Temple or in the provinces: White flecks or water that are not permanent, or back teeth that were notched but were not uprooted; or an [animal] that has scabs, a wart, or boils; [or] an aged [animal], a sick one, one emitting an offensive odor, one with which a sin was committed, or that killed a person (by the testimony of one witness or by the confession of the owner); an animal of undetermined gender, or an androgynous [animal] —- [one may not slaughter these] either in the Temple or in the provinces. R’ Yishmael says: There is no blemish greater than this; the Sages say: It is not a bechor, and it may be sheared and worked with.