b) it prevents clear testing cattle from being moved out of the herd at a time when there is a higher risk of the herd losing OTF status in the near future
b) Bydd gwartheg sydd wedi cael prawf clir ddim yn cael symud o’r fuches – hynny ar adeg pan mae tipyn o risg y gallai’r fuches golli ei Statws Heb TB yn y dyfodol agos.