Is it normal or common for a newborn...

Is it normal or common that my newborn (4wks old) to eat more than 5oz at a feeding already weighs probably around 10lbs. at 3 wks she was 8lbs14oz and at 2 wks was 7lbs 14oz and birth weight 7lbs 11oz. She eats alot! And is starting to sleep 5-6hrs at night and only 1- 2 naps during the day. She holds her head up on her own and loves to try to stand(while I'm holding her) is this normal or anyone else? Or is my daughter a fatty lol