OMG!! Mylo is 11 weeks now and at 10 weeks he was 4 lbs

. So if he was 2.2 lbs at 7 1/2 weeks and 4 lbs at 10 weeks by 13 weeks of age when he gets his last set of shots he should weigh about 6-7 lbs.....Should I be worried? He might just be bigger then his brother (30 lbs) when he is about a year lol
How much do you think Mylo will be?