Any ideas what this could be? He usually is pushing back or arching at the same time. It happens sometimes when try and feed him, even though i'm pretty sure he's hungry and does eventually take the bottle.....just seems a battle. People at my playgroup said it could be teething/hunger/tiredness/wind. Isn't that all there is at this age.....and how should I know which is the problem?! Confused.com!!! :-)