Ventilation is important, but will not necessarily eliminate respiratory disease(which is caused by a viral or bacterial organism).
Fowl pox, which is viral and is carried by mosquitoes, and if the dry variety is not fatal, will disappear within 6 weeks and leave the bird immune.
Fowl pox, which is viral and is carried by mosquitoes, and if the dry variety is not fatal, will disappear within 6 weeks and leave the bird immune.