Wow! I never knew about all this! We've been joking for awhile and calling DS 7mo's high chair his "poo poo" chair since he seems to start pooping when we put him in it. Maybe it's that the new food during a meal is pushing out the old food. I even suggested to DH that we put him on the toilet and that PT would be easy because he already poops sitting up and doesn't like dirty diapers. Time to buy a potty seat!