My 4 month old DS who has always had a good appetite has over the last week really started playing up at feeds - flailing arms, hiding behind his bib & giggling away. Whilst its charming feeds are now taking twice as long & he's rarely finishing a bottle. Anyone have any ideas why this might be? He's also taken to rubbing/flicking the teat on his gums so not sure if it might be down to him teething although no sign of any baby pearly whites yet. Thanks