YOU SAID:

There was a big dog in the water who is very fat and sad.

INTO JAPANESE

とても太くて悲しい大きな犬が水中にいました。

BACK INTO ENGLISH

There was a very thick and sad big dog in the water.

INTO JAPANESE

水中にはとても太くて悲しい大きな犬がいました。

BACK INTO ENGLISH

There was a very thick and sad big dog in the water.