I know that you wrote this message a long time ago but my daughter and I are dealing with this same problem with my granddaughter. The doctor says it is because she lives here with us. She holds it for at least 5 days.
Today I refused to clean her today and she screamed for 30 min. She finally ran to ther bathroom and went more than an adult.I have worked with children all my life and never seen or heard of this before. I have been giving her Advocare products for children and it helps her. She is very stubborn. I need help too.