I am pigeon toed and have been all my life. It's bad enough that people notice. And running is apparently rather comical. But, I live a full and productive life, and played sports, and work an active job. Pigeon toed doesn't have to be the end of the world.
My son is also pigeon toed, but primarily with one foot. I spoke with his pediatrician about it. He watched him walk and agreed that he is definitely "in-toeing" with the one foot, but he said most pediatric orthopaedic doctors will not attempt to forcibly fix in-toeing anymore. The braces that they used to put on kids have been found to be ineffective in the long term, and kind of traumatic for the kids (teasing and such) in the short run.
There are exercises that can be done to strengthen the muscles in the hips and knees. Try putting her in ballet. Ballet forces you to turn your feet out and strenthen the hip muscles that help pull your feet out. Depending on how badly she is in-toeing this might help. (My mother tried with me, but my bones are so far out of alignment that it was a hopeless cause. I cannot turn my feet out even if you try to force them.)
And try to not worry about this so much. In the grand scheme of things, pigeon toed is really not that big a deal. There are many far far worse things that could be wrong with your daughter. You are blessed to have a healthy happy 2 1/2 year old. Don't ever forget that. :)