Hi,
FTM and my baby has now done his 2nd week at nursery and he has been having loose stools this week. He is otherwise absolutely healthy and happy and I wouldn't deem it diarrhoea.
I feel at the nursery he eats quite a lot of food compared to his day to day life at home & he then comes home and has a proper dinner - could his stool just be his tummy adjusting to the new food?