This morning DS (six mths) passed a small hard-ish poo, and then another larger one this PM. Usually his poos are very soft - like mashed potato. He is breastfed but I've just started him on his 3rd meal of the day - breakfast (banana and oatmeal) - up to now he's just had lunch and tea (mostly root veges with fruit puree). Should I worry? His nappy seemed heavy enough ie he was peeing. He did strain a bit - went red and tears appeared in his eyes - but he does this normally anyway. Other than this he seems OK - should I be worried as to this sudden onset of constipation?