Grass in his nappy - that had been swallowed and through his digestive system! I would like to think he would not be unsupervised at nursery for long enough to manage to eat any grass. There is a baby garden at the nursery and he hasn't been on any other grass for weeks, so it's definitely happened whist in their care.
I worry he could have also eaten some soil as he's had an awful bout of vomiting and diarrhoea since :-(
What would you do - am I over reacting to think it is really bad and make a complaint!?