I have a mixed flock so I am interested in this answer for many different types of birds. Peacocks are what has started the thinking though. So I am selling excess peahens. It's taken years for me to figure out how to hatch and keep the peachicks alive. It was a process but the short of it is that they were dying from what seemed to be coccidosis at about a week old. I now pen the mothers and chicks up and medicate for 2 weeks. 100% survival with this. The peachicks being the only sign of coccidosis that I've ever had. Once they pass the critical first few weeks they are strong and they roam without issue. The peahens I'm selling are a year old now. So the question is, am I obligated to tell buyers this? I would like to tell them, so they don't have to have a bunch of deaths on their hands while they figure it out. I just don't want to over share and freak people out about what might not even be an issue for them. Thoughts?