M.R.
Welcome to the 3 year old club. My daughter is doing the same but she won't poop at home. We finally gave up and told her that if she chooses to stay dry then she can wear panties but that since she was pooping in her pants that she would have to go back to diapers until she was ready because mommy didn't want to clean up the mess. It took one diaper and she changed her mind. We had just tried pullups but that didn't faze her one bit and got expensive quick. I used a similar method with a little boy at the daycare where I worked when he wouldn't stop peeing on the playground instead of the potty. These kids are smart and know their options. For them it's all about their choices and for us it's all about the choices we allow. I let my daughter choose how much and what she will eat but I don't allow her to choose what I serve. She gets to choose her clothes and shoes but if she doesn't choose the appropriate place to potty then I choose to not clean up the mess and insist on diapers. Not a popular choice for the girl who wants to be big but it stopped our battle as this issue, at least for us, was about her attitude and not about ability.