YOU SAID:

I'm having a cow on the porch.

INTO JAPANESE

私はベランダに牛を飼っています。

BACK INTO ENGLISH

I have a cow on the balcony.

INTO JAPANESE

ベランダに牛がいます。

BACK INTO ENGLISH

There is a cow on the balcony.

INTO JAPANESE

バルコニーに牛がいます。

BACK INTO ENGLISH

There is a cow on the balcony.