Hi. 10-week old indigenous chicks were fine and active. Then suddenly they became lethargic. Their droppings would continuously be purely water, with maybe a little mucous sometimes. Sometimes they would spit out a few drops of water. They would stay put with eyes closed during the day, drinking a lot but barely eating. One of them could barely walk and it was cold to the touch. However, at sunset it felt warm. The very next morning a number of them were dead. Perhaps they died during the night. What could be the reason?