Matthew Roper theorizes that "goats" in the Book of Mormon may have been a type of deer, such as brocket.
Matthew Roper, "Deer as 'Goat' and Pre-Columbian Domesticate," Insights: The Newsletter of the Neal A. Maxwell Institute for Religious Scholarship 26 no. 6 (January 2006), 2-3
Sometime after the death of his father Jacob, Enos wrote that the Nephites raised “flocks of herds, and flocks of all manner of cattle of every kind, and goats, and wild goats” (Enos 1:21). While contemporary archaeology thus far has not yielded evidence of pre-Columbian goats, anthropologist John L. Sorenson has suggested that Book of Mormon peoples, like the Spanish writers of a later time, may have considered some species of pre-Columbian deer to be a kind of goat.
Although surprising to us today, evidence suggests that some species of Amerindian deer may have been raised and shepherded as “flocks” in pre-Columbian times.
When the early Spanish explorers first visited what is now the southeastern United States, they encountered native Americans who raised semi-domesticated deer. Men from De Soto’s expedition reported that in Ocale, an Indian town in northern Florida, “there is to be found . . . fowls, a multitude of turkeys, kept in pens, and herds of tame deer that are tended.” According to the 16th-century Spanish historian Gómara, in Apalachicola (what is now the state of Florida), “there are very many deer that they raise in the house and they go with shepherds into the pasture, and they return to the corral at night.” Another early historian of Spain, Peter Martyr d’Anghiera, recorded:
In all these regions they visited, the Spaniards noticed herds of deer similar to our herds of cattle. These deer bring forth and nourish their young in the houses of the natives. During the daytime they wander freely through the woods in search of their food, and in the evening they come back to their little ones, who have been cared for, allowing themselves to be shut up in the courtyards and even to be milked, when they have suckled their fawns. The only milk the natives know is that of the does, from which they make cheese.
Additional evidence suggests that deer may have been tamed or semi-domesticated in pre-Columbian Mesoamerica as well. According to Diego de Landa, Maya women “let the deer suck their breasts, by which means they raise them and make them so tame that they never will go into the woods, although they take them and carry them through the woods and raise them there.” When the Spanish passed through the region of Guatemala and Honduras, they likewise encountered and easily killed fallow deer that were not afraid of them. Some Mesoamerican scholars “are convinced that small herds of tamed or semi-domesticated deer ranged through Maya sites, with a result not dissimilar in some respects to the ‘deer parks’ of European royalty.” When they entered the region of what is modern El Salvador, the Spaniards encountered a native people known as mazahuas, who took their name from the practice of possessing and shepherding herds of “white deer,” which disappeared shortly after the Conquest.
Ethnohistorical sources also mention the Mesoamerican custom of caring for deer. Anthropologist Mary Pohl notes that the term ah may in the Motul dictionary refers to “venadillo pequeño criado en casa,” that is, “a little deer raised in a house.” Also related is the Maya term Mazatenango (from Mazatl-tenen-co), which means “en la cerca o muralla del ciervo,” that is, “inside the fence or wall of the deer.” Another researcher suggests, “Perhaps the name originated in the custom of fencing or corralling deer to care for them.” Deer were an important animal in many pre-Columbian rituals and were often sacrificed. In the Guatemala highlands today, some Indians believe that deer are intermediaries between men and the gods and that they speak with the gods in order to cleanse the sins of men.
In light of the evidence for deer shepherding in pre-Columbian times, it is interesting that early Spanish colonists in Mesoamerica associated native Mesoamerican brocket deer with the goat. Friar Diego de Landa noted, “There are wild goats which the Indians call yuc. They have only two horns like goats and are not as large as deer.” He likewise described the small brocket deer as “a certain kind of little wild goats [sic], small and very active and of darkish color.” In the late 16th century, another Spanish friar reported that in Yucatán “there are in that province . . . great numbers of deer, and small goats”—the latter again apparently referring to the red brocket deer native to southern Mesoamerica.
In post-Columbian times the Maya, recognizing a similarity between the European goat and the New World brocket deer, gave the European animal the name temazate from the Nahuatl word for brocket deer (tamazatl). Since some Mesoamerican deer could fulfill many of the same purposes as goats, Mesoamerican deer may have acquired a similar designation among peoples in the Book of Mormon.