One thing I have to ask Peanutter - What is your and your DH's stature? Are you tall....? Long and Lean? Short and chunky? You've got to rememeber that genes will also play a part in how Josh grows.

As it is with my two, they are basically on par with eachother at the same age when it comes to length and head circumference, BUT DS was about 1.5kg heavier than DD and I just put it down to different genes. They have been fed the exact same way, yet they are so different from eachother. I can only put it down to the sad fact that DS took after me (shorter and stockier!) and DD took after DH....tall and slim.

They are both happy, healthy, eat, sleep and poop and I'm doing the best I can. You aren't doing a single thing wrong....you are doing the best you can.