YOU SAID:
I killed 5 people yesterday with my chicken.
INTO JAPANESE
昨日、ニワトリで5人殺した。
BACK INTO ENGLISH
I killed 5 chickens yesterday.
INTO JAPANESE
私は昨日5羽のニワトリを殺しました。
BACK INTO ENGLISH
I killed 5 chickens yesterday.
Come on, you can do better than that.