We vaccinated some 5 week old chick after buying the vaccine online. I read the instructions then decided to follow a YouTube video instead like an idiot. I didn't mix all the dilution mix and instead gave a few chicks a mega dose from the vaccine bottle before realizing what I did. I feel terrible. Did I just Kill these poor chicks?! Has anyone had experience with this and does anyone k ow how to treat it? Tried to call a few help lines but they are closed. Please any advise would be greatly appreciated.