YOU SAID:

an egg is a chicken, whilst a chick is forbidden.

INTO JAPANESE

卵は鶏肉であり、ひよこは禁じられています。

BACK INTO ENGLISH

Eggs are chickens and chicks are forbidden.

INTO JAPANESE

卵は鶏で、雛は禁じられています。

BACK INTO ENGLISH

Eggs are chickens and chicks are forbidden.