Chickens can have watery droppings for various reasons, including drinking more water than usual. Coccidiosis usually affects young chickens between 3-6 weeks old and little older unless they have some immunity problems. Most chickens are exposed to it in small bits in the soil and in their droppings and build up tolerance to it.I’m curious about this cause no one else mentioned it. Some of my girls randomly throughout the day have loose droppings the last few weeks but are acting completely normal too.