I believe I am dealing with meraks. One of my 11 weeks old pullets has been falling down a lot. She would try to get up and then fall back on her butt. It started getting a lot worse. I sent a video to a friend and she told me it looked like meraks. My pullet was so bad today that we put her down. I have 2 older (2 yr old) hens and 5 (11 week old) pullets and 2 ( 8 wk old) bantams (sex unknown) I noticed today that one of my 8 wk old bantams was acting funny. Not wanting to walk around. Is this going to infect my whole flock? They are all free range during the day. I am devastated!! I take such good care of my girls and for this to happen crushes me. Do I get rid of all my flock? Will my 2 older hens get it also? Also, if some of my chickens do make it, will they infect all new chicks I bring in??