My baby weighed 14 lbs. 8 oz at his 4 month visit, February 24. Today he had his 6 month visit and weighed 15 lbs. 15 oz. He went from 37% to 17%. Is that alarming? Doctor was completely unconcerned about it but this just doesn't sound right to me. Ok, so he IS very active, like he's crawling all across the kitchen floor on his stomach and he turns over every few minutes while playing... but this drop in percentiles just scared me.