do take all other reasonable precautions to avoid transferring anything which might be contaminated with mud, slurry, animal faeces, excretions, feathers or any other similar matter between premises
Rhaid i chi ddefnyddio mesurau bioddiogelwch llym i atal unrhyw ddeunyddiau, offer, cerbydau, dillad, porthiant neu wely adar a allai fod wedi'u llygru gan adar gwyllt rhag dod i'ch safle.