Mushure mekunge chirwere ichi chapararira muUnited States muna 1879, chakatambudza mapoka emombe kubva kumatunhu akati wandei. Kuputika kwacho kwaive kwakanyanya zvekuti kwakakonzera kurambidzwa kwekutengeserana nehurumende yeBritain, ichivharira zvipfuyo zveUS kuBritain neCanada. Izvi zvakaita kuti United States igadzire Animal Industry Bureau, yakavambwa muna 1884 kuti iparadze chirwere ichi, icho chakabudirira kuita na1892.
Mazuva 20 kusvika ku123