I went and got some probiotics and started that and got some Apple cider vinegar too. Will give the probiotics for 3 days then the raw apple cider vinegar in thier water. I clean their food dishes out and change the brooder towels twice a day. (I tried wood shavings and they ate it), I found a window had been left open all night by them and they were chilled. They have a Brisnea Eco warmer plate they sit under, and it's 73 in here. Only one now is having poop issues but will give all of them the probiotics. They get the same foods and clean water and a little bit of plain oatmeal every day, nothing else. Amd I havent let them outside yet as it's been very windy and cold here.
My Runners ate shavings when they were little, too. And one of them always had loose brown stool, no matter what...