Calves of 42 days of age and over must have tested negative to a TB test within 90 days of the movement.
Ar ôl 21 diwrnod, bydd angen prawf ychwanegol ar anifeiliaid sy'n cael prawf antigenau BVD positif er mwyn penderfynu a yw'r anifail wedi datblygu imiwnedd.