She might be ready for just one day sleep. We have transitioned slowly to one day sleep between 11:30am and 1:30pm (in fact I am boobing her to sleep now).

During the transition phase she had some days where she had two sleeps and she either wouldn't go to bed till 9pm or we would be up at 5am!

Try pushing back the first sleep by ten mins each day and the wakng her from a second sleep a bit earlier each time...so eventually the arvo sleep is a catnap and then nothing, while morning sleep becomes a middle if the day sleep.

HTH! I too would refrain from introducing more milk feeds!