My little Coco was sooooo small when I got her and at 12 weeks she was barely a pound. Now at a year, she's 4lbs 9oz. So doubling her weight at 12 weeks didn't work for me (thank GOD!!! That would have been wayy too tiny). I think they come in different shapes and sizes. Even knowing their parents' weight doesn't help that often. My friends yorkie is HUGE and he came from standard parents 5lbs, and a champion yorkie in his lineage. He is like 13 lbs, but just the sweetest thing. Coco great a ton between 6-8 months. She was like 1.5 lbs forever and in between 6-8 she gained like 2-3 lbs..it was weird but definetely better that way. Can't wait to see pictures of your baby |