Dietary assumptions of the Book of Mormon

Brigham H. Roberts in the context of discussing the mismatch between the domesticated animals of the Book of Mormon and the American Indians as researched in 1917 (p.98), notes that the animals that the Indians had domesticated, foremost of which is the dog, are not the animals the BoM mentions, such as cows and oxen, sheep, goats, swine (in the case of the Jaredites), and famously horses (p.98f). Roberts then comments that no milk consumption is recorded in the BoM, but there he is mistaken, as milk and butter occur in 2 Nephi repeatedly (but only there).