My daughter turned 2 months on 8/22 we recently have noticed she is eating less formula she was taking 4 ounces no problem now she will take 2.5 to 3 ounces we just switched her formula 3 days ago and use dr. Brown bottles size 1 nipples she does this thing where she pushes the nipple out with her tongue and its impossible to get her to suck again to finish the bottle she has been bottle fed since birth and as of the past few days shes refusing to take any pacifiers where she was taking them easily anyone else experience similar changes? Shes on the lower side for weight so I am concerned about her not gaining weight from her pushing the nipple out. Should we try using size 2 nipple instead for her to get the formula with a faster flow?