So I did a very stupid thing a week ago, and added a new pullet to my little flock. Of course, she brought something extra - a respiratory disease. All the chickens are about three months old. I put them all on Duramycin in the water. The new pullet kept sneezing, and my favorite hen started standing still, puffed up, with runny poo, and barely eating. I started them on Tylan injections, giving the new pullet an extra injection per day. Today is day three, my favorite hen is even more listless, and the other three are starting to act that way too. The new pullet has been active with a great appetite throughout and her sneezing is nearly gone. She's done fine while the rest are going downhill. I have dusted for lice and mites, and see no sign of them. Today I put the worming agent in their water. Should I try Corid now? I don't want to lose my flock. 1) What type of bird , age and weight. Three month old Speckled Sussex hen, Black Austrolorp hen, White Leghorn hen, Buff Orpington hen, EE roo. 2) What is the behavior, exactly. The Sussex was sneezing and hoarse, but is much better after starting Tylan. The rest are puffy, standing still, runny poo, listless 3) How long has the bird been exhibiting symptoms? The Sussex, sneezing for a week. The Australorp - two days. The others - one day. 4) Are other birds exhibiting the same symptoms? See number 2 above. 5) Is there any bleeding, injury, broken bones or other sign of trauma. No. 6) What happened, if anything that you know of, that may have caused the situation. Adding the Sussex to the flock. I'm an idiot. 7) What has the bird been eating and drinking, if at all. The Sussex eats and drinks fine. The Australorp very little, though I've dipped her beak in water and yogurt. The others not as much as usual. 8) How does the poop look? Normal? Bloody? Runny? etc. Runny. 9) What has been the treatment you have administered so far? Dusted for mites and lice six days ago. Four days of Duramycin (no apparent effect), three days of Tylan injections (helped only the Sussex), two days of vitamins, and now Wazine in their water today. 10 ) What is your intent as far as treatment? For example, do you want to treat completely yourself, or do you need help in stabilizing the bird til you can get to a vet? I cannot afford a vet. I must treat them myself. 11) If you have a picture of the wound or condition, please post it. It may help. Posted below. 12) Describe the housing/bedding in use. Wood and wire chicken tractor, dirt and grass floor. Thank you for anything you can advise ... Shown are my favorite Austrolorp hen and my EE roo. Our Typhoid Mary, a Speckled Sussex, is in the background.