[Kizzys Mom]

I got her when she was 6 weeks old she weighed1 pound. She is now 9 weeks and weighs barely 2 lbs. Just wondering if this is a fast or slow weight gain. I just hope I got one that will stay 5 lbs and under, I know there is no way to know for sure but does her weight gain sound about right for her to stay under 5 lbs or does anyone know. She weighed 4 oz when she was born. If anyone has a clue as to how fast their weight gain tells about how big she will probably be when she is grown?
She is my first yorkie.
She is doing really good with going out to poop but going to wet she isnt catching on quiet as fast, I think maybe the pee part is harder for her to control. But she has NOT pooped in the house but one time in over a week and is beginning to go stand at the back door to go out and sometimes she will whine and sometimes kinda yelp. I take her out and always give her a treat even is she dont poop. I always tell her what a good girl and pick her up and pet her.