He's been weaning from about 5 months and is able to sit up in a highchair with a tiny bit of flailing around (!). I'm feeding him 3 meals a day and some finger foods, but my problem is that really often as soon as I strap him in his chair he starts crying so hard that I can't actually get any food in him. Sometimes I know it's because he's tired, but other times he's well rested. I've tried feeding him in other places and that doesn't seem to help either. Has anyone else had this happen? Any advice or tips on why it might be happening?