YOU SAID:
the dogs aren't eating grass feed chicken
INTO JAPANESE
犬は牧草飼料の鶏肉を食べません
BACK INTO ENGLISH
dogs don't eat grass fed chicken
INTO JAPANESE
犬は牧草で育てた鶏肉を食べません
BACK INTO ENGLISH
dogs don't eat grass fed chicken
That didn't even make that much sense in English.