This leghorn is exactly one year old, bought from TSC (I have 4 other leghorns purchased at the same time). She got a prolapsed vent a week ago. She was brought in, isolated, given Epsom salt baths and Preparation H on the vent daily. She healed beautifully and was even laying eggs daily. I was planning on putting her outside yesterday when she suddenly went lame. She has not stood in 24 hours. She will eat and drink, poop looks normal. Her eyes look fine, nothing looks wrong besides she won't stand. Could this be Marecks? I am really nervous. The rest of the flock is acting fine but of course I don't want to loose them to this.