My ebf ds is 9 weeks old. He was pooing every few days and it was yellow and runny and copious but recently he is going much more often - today he has been 4 times! - the poos are smaller in volume but thicker and seedy and curdled They have varied in colour from dark yellow to orange to the occasional green one. I can't think why this change has occured. He seems well in all other respects. Should I be worried?