If no other symptoms are associated with the cough , just a sneez then no worry just improve on the ventilation to reduce accumulation of ammonia and or dust. Otherwise you could be having chronic respiratory disease among other differential diagnosis that should have have you visit the nearest vet shop for antibiotic prescription. Meanwhile have the coughing birds isolated from the rest.my chicken trouble with cough what kind of medicine does I suppose to give them
Go for Esb3, broad spectrum. Should symptoms persit get help from vet nearby for farm inspectionSorry can you help me kind of medicine which is appropriate