Hi M.!
Ears are "tricky" at this age, aren't they!!!!!!!
When my boys were little, I was told to watch their head position when feeding. If their head was slightly elevated over their chest, then the milk was able to go down and not get stuck in the Eustchian Tube....which what causes an ear infection.
Using that info throughout their young years, I used to prop their heads up on firm pillows at small intervals of time to allow for easier breathing, eating etc... Or was just cautious while feeding them a bottle. This eliminated the amount of ear infections they had when they were young. Truly....they each had only one. Now, were they lucky, or was is it because I elevated their heads? :o) I'll never know.....
Now they are 11 and 5, and with all the swimming we have a different ear routine :o)
Hope your daughter feels better soon.
:o) N.