The timing of previous housing measures has meant that free-range turkeys, geese and ducks have been slaughtered for consumption before they reached the 12-week derogation limit.
Mae amseru mesurau lletya blaenorol wedi golygu bod tyrcwn, gwyddau a hwyaid maes wedi cael eu lladd i'w bwyta cyn iddynt gyrraedd y terfyn rhanddirymiad o 12 wythnos.