I agree with the others. You need to go back to 4 bottles a day. My little guy is only days older than your DD and he's on 4 bottles a day as well as 3 solid meals. IMO, I think milk is more important than solids at this stage.

We have a routine of - 7am bottle, 9am breakfast, 11am bottle, 1pm lunch, 3pm bottle, 5pm dinner, 7pm bottle and bed. That's a rough routine. If he isnt drinking his bottles I usually skip lunch and offer him his bottle again.