wow that is weird because mine that were doing the same thing are up and running around. Sounds like very weak chicks perhaps because they came out to early I don't know the vitamin e and polyvisol should have helped. If you think they are dehydrated try giving them some electrolyte water. Sorry I was hoping for sure the vitamin e would work but only give them that once a day. Give the polyvisol 3 times but if they aren't showing any changes I would switch to the electrolyte.
