Can lack of water cause this? I have a Gatorade dripper and this last week I started putting in a milk jug with water to try and keep up with the demand. They make such a mess with the dripper. I keep them in a 36x36 card board box....they have wide wood shavings. I noticed 2 weeks ago tiny black bugs I don't know what they were and I don't know where they came from I had never seen them before. But the chicks seem to enjoy the challenge and ate them and I don't see to many now. They are eating med. chick from purina. They get very little other stuff. I threw in some baby spinach leaves the other day but less then one leaf per chick. I have never had this problem...and the NPIP girls were out at another location last week and I am pretty sure the ship out tests were good too.