OK I've got quite a few chickens with several housed together but others in different pens all being on the ground or at least access to it. Several of them have developed a sneeze or wheeze or cough. I gave them all Wazine in their water last weekend on Saturday I believe and bought ivomec pour on to put on them in another week or so. I figure it is upper respiratory but not sure if it is worms causing it or not. Will this be enough to fix the problem or is there an antibiotic I should be giving them. Could inadequate ventilation be a cause of this? I think I have it ventilated enough since there is no moisture build up and no wet droppings under the perches in the coops. There are so many different ailments that I cant tell one from the other..