Although Wales and GB have high levels of self-sufficiency of both eggs and poultry, there is significant trade volume between GB and EU/NI.
Er bod gan Gymru a Phrydain lefelau uchel o hunangynhaliaeth o ran wyau a dofednod, mae nifer sylweddol o fasnach rhwng Prydain Fawr a'r UE/Gogledd Iwerddon.