YOU SAID:

I have 300 dogs in my cat house.

INTO JAPANESE

私は猫の家に300匹の犬がいる。

BACK INTO ENGLISH

I have 300 dogs in the house of a cat.

INTO JAPANESE

私は猫の家に300匹の犬がいる。

BACK INTO ENGLISH

I have 300 dogs in the house of a cat.