YOU SAID:
The chicken entered the pen
INTO JAPANESE
ニワトリがペンに入った
BACK INTO ENGLISH
the chicken entered the pen
INTO JAPANESE
ニワトリが囲いに入った
BACK INTO ENGLISH
the chicken entered the enclosure
INTO JAPANESE
ニワトリが囲いに入った
BACK INTO ENGLISH
the chicken entered the enclosure
That didn't even make that much sense in English.