YOU SAID:

I have a dog I love a lot.

INTO JAPANESE

私は大好きな犬を飼っています。

BACK INTO ENGLISH

I have a dog I love.

INTO JAPANESE

大好きな犬がいます。

BACK INTO ENGLISH

I have a favorite dog.

INTO JAPANESE

好きな犬がいます。

BACK INTO ENGLISH

I have a favorite dog.