http://yorkiepassion.com/growthchart.htm - this is a growth chart someone sent me. I have also heard you can triple their weight at 8 weeks and double at 12 weeks. But as Pat said, it is only a guideline.
With humans, they say their height on 2nd birthday - double for adult height?????
My puppies are one week tomorrow, they were 4, 4, 5, 6, 6 oz at birth and 3 have added 4 oz. One 6 oz gained 4.5, and one 4 oz has only gained one, so then what?