I can't say this will help you change her schedule, but our excersaucer often our lo.
The other thing that often works for her is to give her a bottle and a few hours later give her the solids. Usually she poops in between the bottle and the solids. Becuase she is not a great sleeper, I sometimes giver her a bottle when she wakes up around 5:00 and then throw her back in bed. I know it is not following all the BW ideas, but she has never been a great sleeper. What seems to happen is her system gets "working" when we give her the first bottle.