My 10wo dd has started crying when we try and feed her (she's bottle fed) - it's as though either something hurts or she doesn't like the taste, although there's nothing new to dislike. Once she's started she's inconsolable for up to an hour - and she stuffs her fists in her mouth and sucks on them like mad. Eventually she will feed but only takes about half. It's worse in the evenings - it's not wind or thrush or tiredness, though she slept for most of yesterday, and we've been using medium flow teats for a couple of weeks. She's good tempered the rest of the time. Could this be early signs of teething?