Most of us have experienced it at some point: we are riding our horse in the indoor arena in winter and suddenly we notice a strange noise coming from the direction of the head. A cough. But what does this mean? Is our horse actually ill? Or is there a completely different cause? Diseases and problems with the respiratory tract of horses are a broad field, ranging from the upper respiratory tract to the depths of the lungs. Diseases are often attributed to a single cause and other reasons are ignored. However, as it often happens, it is worth taking a closer look at the husbandry conditions and environmental influences that our horses are confronted with on a daily basis. An overview of the diseases and problems that exist and what to do in an emergency.