Bottle quantities

My baby girl just turned 8 months old and is 22 lbs! She sure loves her some food and milk! She drinks formula bc my milk never came in and lord knows we tried everything.

Anyways, she has an ear infection and while she’s had them before, this is the 1st time she’s not been finishing her bottles. Is it normal at this age to not drink as much or to start drinking less?

She drinks 5, 6oz bottles a day and 2 small meals. She ate all her lunch, but is down 5-6 oz already today. I’m not worried about her weight or her wet diapers (she’s doing just fine there), just curious is all.

Thanks!