Hi guys so I have a bit of a problem. I have one chick who was perfectly healthy yesterday, but now is tucking its head underneath itself, when it moves it runs backwards and falls over. It also seems to sleep a lot, well it looks like its sleeping. My other 63 chicks are fine, and not showing this, they are all on chick starter crumbles with a coccido stat included, and have a multi B vit in their water.
I don't know whats going on or what has happened. I am going to give it a multi vit now and separate it for a while so the others cannot hurt it. here are some pictures

any help would be much appreciated
I don't know whats going on or what has happened. I am going to give it a multi vit now and separate it for a while so the others cannot hurt it. here are some pictures