Amber is a Dutch pony D breed (NRPS). In his training we have observed that he begins to breathe with difficulty, that we accused him of the heat, but it has also happened on days with less heat. Despite having his mouth checked and eating the same amount of feed and forage, he is losing weight. In his physical examination we have observed: dry cough, very unproductive or non-productive with dry sound; clear, fluid mucus; weak and short expiration, with respiratory effort; and look haggard.