I'm not terribly worried but DH wanted me to ask some wise Mumsnetters 
9mo DS is very healthy and happy - off-the-charts long for his age, although 25th centile for weight - but has times when he has a distinctly yellow tinge to his skin. The sclera of his eyes are white and his poos and wees are fine. Family and friends have commented on it, although nursery haven't mentioned anything and they're very good at mentioning anything out of the ordinary. DM's theory is that they feed him lots of carrots there
although I have heard of carrots turning people a bit orange.
Any ideas, or do you think this is just within DS's normal range of hues?