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.
That didn't even make that much sense in English.