Isaiah 11:6 (King James Bible) the wolf also shall dwell with the lamb and the leopard shall lie down with the kid and the calf and the young lion and the fatling together
The 1852 LDS edition accidentally dropped one of the repeated the’s in a long sequence of conjoined nouns in 2 Nephi 21:6; the LDS text has continued this reading. The tendency to remove the repeated determiner has been very strong throughout the history of the Book of Mormon text. For discussion, see 1 Nephi 17:22 as well as conjunctive repetition in volume 3.
Summary: Restore the before fatling in 2 Nephi 21:6, the earliest reading of the Book of Mormon text as well as the King James Bible.