A.H.
My son caught on to peeing right away, but would also hide to go poop (although I didn't give him the pull-up). I would only give him a pull-up at night (to protect the sheets) and would put it on OVER his underwear so that it wouldn't confuse him. He knew that he was a big boy and diapers/pull-ups were gone... only big-boy underwear. I think that your daughter is definitely ready (my son was also 27 months when he trained), but it took some bribery to get him to poop. He also hid, so he knew the feeling, but for some reason, some kids are afraid of doing that on the toilet. We ended up going to the store and he got to pick out a toy. I told him what a cool toy it was and put it back on the shelf and told him that we would go back and get it after he went poop on the toilet three times. We were back in four days to get it. We've never had an accident since and he still talks about his 'prize' as the toy that he got to pick out because he was a big boy and went on the big boy potty. Good luck!