YOU SAID:

I have a dog unfortunately it got sick and lost both it's legs

INTO JAPANESE

私は犬を飼っていますが、残念なことに病気で両足を失いました。

BACK INTO ENGLISH

I have a dog who unfortunately lost both legs due to illness.

INTO JAPANESE

残念ながら病気で両足を失った犬を飼っています。

BACK INTO ENGLISH

Unfortunately, I have a dog who has lost both legs due to illness.

INTO JAPANESE

残念ながら、病気で両足を失った犬を飼っています。

BACK INTO ENGLISH

Unfortunately, I have a dog who has lost both legs due to illness.