YOU SAID:
i have dog but i do not have got dog
INTO JAPANESE
私は犬を飼っていますが、犬を飼っていません
BACK INTO ENGLISH
I have a dog, but I don't have a dog
INTO JAPANESE
私は犬を飼っていますが、犬は飼っていません
BACK INTO ENGLISH
I have a dog, but I don't have a dog
That didn't even make that much sense in English.