I know when I brought Sophie Home almost a month ago...I took her immediately to the vets for a check over.
We went back in two weeks for her 12 wk shots and she gained 1 pound exactly in that two week period~
So thats 1/2 pound a week! LOL
She is doing well...it will be interesting when I take her back for her Rabies and get her weighed. We can tell she has been growing or going through a Growth spurt of some kind.