YOU SAID:

I went to put my dog down because yeah

INTO JAPANESE

犬を置きに行ったんだ

BACK INTO ENGLISH

I went to leave my dog.

INTO JAPANESE

私は犬を置いて行った。

BACK INTO ENGLISH

I left my dog behind.

INTO JAPANESE

私は犬を置き去りにした。

BACK INTO ENGLISH

I left my dog behind.