(Long post, sorry and thank you in advance for reading!)

The last two days, my girl has been extremely difficult to feed. She's formula fed.

She'll drink a little and then she goes rigid and whines and turns her head away. We stop and let her sit for a little bit but it just continues each time we offer more. She's taking almost an entire hour, it not more to finish most her bottles. Two days ago, I had switched from #1 to #2 nipples (Avent). Yesterday when she started acting up, I thought maybe it was due to the nipple change so I went back to #1s last night and continued them today.

I was able to get her to eat one of her bottles today when I offered it in a different room. She was distracted a little and looked around a lot but she continued to eat at least. We usually fed her in the same room, same chair. Maybe she's tired of the room?

I don't know if it's related but earlier this week, she started taking her pacifier again. I've offered it in lieu of her bottle a couple times and she doesn't seem to mind it. Maybe this has something to do with it?

Maybe a teething thing? Nothing has popped thru yet but she loves chewing on things and drools a lot.

She's been on the same exact formula since 1 month old (she's 5 months tomorrow). It's Similac Pro Advance. She usually eats around every 3 hours and takes 6ish oz. She consumes about 30 oz every day.

She has been learning to sit up on her own so that's been a little bit of a struggle with feeding her too - she tries to sit up a lot during her bottles but she's been like that for weeks now.

I feel like she shows some hungry signs but then she acts like this so idk what to think, other than waiting longer between feedings but I know her total intake for the day will decrease if she does that based on her sleep schedule. And because I don't think she'll drink more per time to offset going longer. But maybe I need to try. She'll definitely let me know if she's truly hungry, right?

Sorry for the long post. Just a FTM here feeling frustrated. Obviously I don't want to force her to eat but I've always worried that she's not eating enough anyway. I keep reading they should be eating 2.5 oz per lb. She weighed 16 lbs (75th percentile) at her 4-month appt, so that'd be 40 oz per day. Ahh. Any suggestions? Anyone else dealing with this?