I remember looking at that chart when i first got Pixie at 14 weeks (1lbs 7oz) and thinking; omg! she's going to be tiny!!
I was hoping she would get over 4lbs but she's a very petite 3lbs at 2 years old. The chart was actually pretty accurate for her. They say to triple the weight at 8 weeks and to double it at 12. She has a very slight frame...but i don't worry too much about weight now as she is a little piggy..she LOVES her food and she's very bouncy, happy & healthy.
