Slightly panicy first-timer..
DS was born on the 75th percentile (8lb 8) and is now on around the 12th percentile (13lb) at 16 weeks, having previously reassured us by tracking the 25th percentile for a month after a steady drop from the 75th. On the plus side he's gaining fairly steadily, just more slowly than is ideal. He's always been very long (always around the 90-95th percentile for height - he's alread growing out of some of his 3-6 month sleep suits!), is very active and alert and is usually a little ahead on the developmental milestone stuff. We EBF more or less on demand - I've been following the EASY eat-activity-sleep-and-repeat thing for a few weeks, which he seems very contented on, but would obviously feed him whenever if he showed any signs of wanting it. It took us a few weeks to get the latch right at the beginning, but we've been told everything's fine. Both DH and I are tall, thin and struggled to gain weight as children so it might just be genetics. All of which is a roundabout way of saying that I think he's actually ok, but am wondering if there's anything I'm missing? The HV is mildly concerned and there are mutterings about FF top ups and seeing the GP.