wow he's a big boy! My boy is 22 weeks and weighs a bit more than 18lb and grows like a mushroom!!! Yes he's bf only, I will start offering him other food at 6 months, wonder if his weightgain will slow down? I start baby swimming too the docs told me he's a bit "lazy" (because of his weight) and will need a little help with gross-motorskills. He's not soooo chubby, but is a good eater. I have to go change whis wardrobe every 2-3 weeks - a financial disaster :D