5 month old punching when feeding...

[Tash28]

I've noticed the last couple of days that he's arching his back and punching the bottle during a feed.

Has anyone else come across this punching? He suffers with reflux so it's reminiscent of the early days of that but instead of punching the bottle it was grabbing his chest.

Thanks

I though punching/patting the breast was to stimulate production, so maybe just misplaced instinctive behaviour?

Maybe time to go up a bottle teat size?

DD does this and its only got worse (she's 9months now) I usually give her something to hold (muslin rattle ect) if not she whacks the bottle or pulls my hair! She doesn't arch her back though? Maybe try feeding in a slightly different position?

Ds does this but he's breastfed. He punches/ grabs my boob while he's feeding and if the milks not coming quick enough he will arch his back (seems like frustration) until my milk flows a little faster and then he settles.
I'd maybe do as others have said and maybe use a larger flow teat and see if that helps. Unfortunately my boobs don't have a larger flow teat do looks like I'm stuck with sore boobs for now lol