Went to bed last night with what seemed like 21 healthy chicks. Woke up at 530 and checked on them and one was dead. We removed her and then 2 others started acting weird. Took them out and gave them a little sugar water with a dropper. One died shortly after the other is still kicking, but still lethargic. We have a nipple waterer and I'm always worried they aren't getting the water out of it. I went and got a dish with water and put it in with the chicks. They flocked to it and drank like crazy. About 10 mins later we had several chickens vomiting and flopping around. Some looked as if they were paralyzed and couldn't move. We put them in another box with another lamp and we are hoping for the best. Some are now moving, but slowly. We ended up losing 4 at this moment. Hoping the others bounce back. Did we do something wrong? We are very new at this and I only know what I have read on how to care for them.
UPDATE: A couple of the chicks we thought were done for. They were limp and liveless. We put them in a box and put them on the porch until we could dispose of them. Minutes later these things were chirping like crazy. We brought them back in and put them under the lamp. We had a few others that were doing the same thing so we huddled them together and put them under the lamp. We left to get a different waterer and came back a couple hours ago. 4 of the chicks we put in a separate brooder seemed to have snapped out if it. They were walking around scratching and eating. 2 others did not. They were the smallest of the batch. One died and another is still fighting. We put the ones that were up and moving back with the other chicks. They were all doing fine until I put the new waterer in with them. They all drank out of it immediately. Now one of the ones we placed back with the other chicks is again doing the vomiting, flopping and acting paralyzed like. They look like someone snapped their necks when they do this. Their heads go all the back and touch their backs and they are just limp. I've never seen anything like it. Could maybe they be drinking to much to fast and drowning themselves? Just to add...we changed their bedding yesterday along with the container they were in. The lamp was raised as a result, but still at 90 degrees and we have it pointing to one side so they can get to a cool area if they need to.