Potty Training Update

Just thought I'd give a little update on Zoey and ask for some help. She is doing great on peeing in the potty, but she has a hard time pooping (I know I totally sound like a mom of three kids. Sometimes I wonder if I actually did ever go to college and if I know any words bigger than two syllables). She will stay dry all day and gets very upset when she does have an accident. She is proud of being a big girl. I'm proud of her, too. She's really taken to this potty training thing. She even does well when being babysat. She did go poop one time and was so proud of herself. I thought we'd kicked it, but she still won't go. She'll keep going in the bathroom and sitting on the toilet, but won't poop. I can tell that she's frustrated, too. If anyone has any suggestions, that would be GREAT!!