A friend and I bought a bunch of chickens from a backyard farmer, but they seemed to be infected with CRD (Mycoplasma gallisepticum). We treated with anti-biotics, and culled the sickest birds. Most seem to be OK now, but one of my friend's birds has had a serious relapse. It seems sick enough to cull, but now it's large enough to be worth eating. Is eating a bird with CRD OK? Apparently most backyard flocks have it, so it seems unlikely that nobody is eating these sick birds. I can't find any guidance one way or the other on the internet though. Aside from this link, http://www.fao.org/docrep/003/t0756e/T0756E08.htm#ch7.2.4 which seems to mostly say, "Don't eat the lungs and neck."