Traditional kefir was made by putting the kefir grains in goatskin bags with raw milk; the bags were hung near a doorway and knocked by anyone passing through to help keep the milk and kefir grains well mixed. (nourishingtraditions.com)
Black slingback shoes made of goatskin leather. (kelkoo.co.uk)
They uncovered a pattern of interleaved calfskin and sheepskin, with goatskin used as a last resort. (sciencemag.org)