YOU SAID:
your cat is fat and he loves to chew mats
INTO JAPANESE
あなたの猫は太っていて、彼はマットをかむのが大好きです
BACK INTO ENGLISH
Your cat is fat and I love to bite a mat
INTO JAPANESE
あなたの猫は太っているし、私はマットをかむのが大好き
BACK INTO ENGLISH
Your cat is fat and I love to bite a mat
That didn't even make that much sense in English.