apply to British Cattle Movement Service (BCMS) for a cattle passport within 27 days of birth at the latest, or 7 days for bisons
gofynnwch i Wasanaeth Symud Gwartheg Prydain (BCMS) am basbort gwartheg cyn pen 27 diwrnod ar ôl geni’r llo fan hwyraf neu 7 niwrnod ar gyfer beisonau