My 17 month old has just stoped eating he is really fussy on and off anyway but the last 3 days I can't get him to eat bearly any thing even things he normally loves. Yesterday all he ate was a bit of cereal, a few baby crisps/chips and a tiny square of toast. I'm trying to offer him a wide variety of food but it seems he doesn't want any thing. He will drink ok. I'm wondering if it's his teeth but he doesn't seem seem overly upset maybe a little more sensitive at times. Any advice?