I believe my new EE hen has developed CRD. I got two hens last sunday. The EE got a bubbly eye. So I moved her to a smaller cage [that's when I noticed her very low crop]. So I did some investigating and think it is pendulous. But that seems to be the least of my worries. The EE got worse, swollen eye and swollen head around the eye. She also has mucus crusted around her nostrils and labored breathing. She is drinking but not eating. I have been giving her Tylan injections (1/2 cc) for the last three days with no improvement. Today there was blood in her sneezed up mucus. I am wondering if I should cull her or does she have a chance? And what about my other hen(BO)? Will she get CRD? They were eating and drinking out of the same feeder/waterer. The BO has black spots on her comb (avian pox I think), but has no symptoms of CRD. Will she develop it? I have two pullets in a seperate coop. If the birds do recover will they spread it to my pullets? Should I cull both these birds because they both have a disease that could kill my little ones?