DS is six months, fed on half breast and half bottle, with one solid meal a day of baby rice and fruit puree. He's just done the weirdest poo ever - sorry for details but it's full of little black threads, it looks like he's eaten a reel of cotton! Worried it might be worms of some sort - but they aren't moving and I know that threadworms are white. Waiting for NHS Direct to ring me back. In all other respects he is his normal healthy self. Anyone else seen this before?