YOU SAID:

I will never get a dog

INTO JAPANESE

私は決して犬を手に入れないだろう

BACK INTO ENGLISH

I'll never get a dog.

INTO JAPANESE

私は犬を飼うことはありません。

BACK INTO ENGLISH

I don't have a dog.

INTO JAPANESE

犬 飼ってない

BACK INTO ENGLISH

I don't have a dog.