“Sheep are known throughout most of the world, even though, as in Central Africa, they are a far cry from the fleecy wool-producing animals of colder climates. Where such animals are known, even by seemingly strange names, e.g. ‘cotton deer’ (Yucateco) or ‘woolly goat’ (Inupiaq), such names should be used. In some instances, one may wish to borrow a name and use a classifier, e.g. ‘an animal called sheep’. In still other instances translators have used ‘animal which produces wool’, for though people are not acquainted with the animals they are familiar with wool.” (Source: Bratcher / Nida)
Note that the often-alleged Inuktitut translation of “sheep” with “seal” is an urban myth (source Nida 1947, p. 136).
See also lamb.