YOU SAID:
i am at the dogs and were partying
INTO JAPANESE
私は犬のところにいて、パーティーをしていました
BACK INTO ENGLISH
I was at the dog and had a party
INTO JAPANESE
私は犬のところにいてパーティーをしました
BACK INTO ENGLISH
I was at the dog and had a party
That didn't even make that much sense in English.