YOU SAID:

My dog's name is Oscar and he tried to run away today but I caught him so he's back but he really scared him and I thought I lost him forever

INTO JAPANESE

私の犬の名前はオスカーで、彼は今日逃げようとしましたが、私は彼を捕まえて戻ってきましたが、彼は本当に彼を怖がっていました。

BACK INTO ENGLISH

My dog's name was Oscar, he tried to escape today, but I caught him and came back, but he was really scared of him.

INTO JAPANESE

私の犬の名前はオスカーでした、彼は今日脱出しようとしましたが、私は彼を捕まえて戻ってきましたが、彼は本当に彼を怖がっていました。

BACK INTO ENGLISH

My dog's name was Oscar, he tried to escape today, but I caught him and came back, but he was really scared of him.