I've been struggling with anxiety over my 8 month year old son's weight for ages. trying not to get obsessed with weight charts, comparisons etc, but it's hard, as he is tinier than all the other babies of his age I've come across. He's never had much interest in food, milk or solids, breast or bottle and recently had a cold so ate even less. He now weighs around 7 kilos and just looks tiny and skinny, though seems happy and active most of the time. Should I just chill out or seek professional advice? Neither I nor my partner are very tall, so i'm not expecting a giant but he has been dropping weight groups (now below 2nd percentile). HELP!!