We have 6 bantam cochin chicks born on Christmas Day. All was well, eating good, scratching, pecking all normal up to today. This morning went to check on them and one was walking backwards, kept it's butt in the corner. Not eatting much and actually acts drunk or like it has an inner ear infection and is off balance. So we separated that one from the other cochin chicks. Went out to do grocery shopping. Came home 3 hrs later (around 2 pm) and found the drunk chick laying on it's side. I thought it was dying. Checked on it about 25-30 min later and it was sitting normal, but then not long after that was laying on it's side again. Checked on the other cochin chicks a few minutes ago (6:30 pm'ish) and another cochin chick is wobbling around. So I moved it to where the "drunk" chick is at. (8:00 pm) Just checked on the two chicks. One was laying on it's back. But when I opened up the cage it tryed to roll over on it's own. Couldn't so I helped it and it instantly started eating. But whatever this is it looks like it's spreading. Please HELP! What is this? How did they get it? And what do we do now?