DS nearly 6 months, not weaned at all yet. Was mix-fed 50-50 BF/Ff but in last few weeks has dropped all but a 4oz bottle of formula at bedtime, so almost EBF now, weight gain tracking a centile. He has form for infrequent poos that are paste-y consistency, but last couple of days they have been really solid lumps of poo which he has been straining to pass. Normal mustard yellow colour and he seems fine, feeding well. What gives? Everything I have read suggests solid poo isn't normal.