YOU SAID:

My dog is so fat it wants to die

INTO JAPANESE

私の犬はとても太ってそれが死にたいです。

BACK INTO ENGLISH

My dog is too fat, it will die.

INTO JAPANESE

私の犬は太りすぎて、それが死ぬでしょう。

BACK INTO ENGLISH

My dog is overweight, will die of it.

INTO JAPANESE

私の犬は太りすぎ、それで死ぬでしょう。

BACK INTO ENGLISH

My dog is overweight, will die of it.