I picked up three Wyandotte chicks this morning at a chicken swap, they are about three weeks old. They haven't been on medicated feed but I just started them on it when we got home. They all seem to be acting normal from what I can see (this is my first time having chicks). One of them just passed a stool that looks like this and I'm wondering if I should be worried. All stools have been normal until now, they've been home about 8 hours.