Nope - the only worry is if it's tooooo late then the 2 mths an 4 mths ones are close together. James is 9 weeks on Saturday and hasn't had them yet because of his cold, and will get them Monday if he is well - if not it will be after Xmas too. Izzy is 19 mths tomorrow and hasn't had her 18 mths ones for the same reason.