What happens if a dog’s respiratory infection becomes severe?

A severe respiratory infection in dogs can lead to a series of complications and health problems. First, a serious respiratory infection may cause inflammation of the trachea, bronchi, or lungs, resulting in difficult breathing, persistent coughing, rapid breathing, and reduced exercise tolerance. Second, a severe infection can cause fever with symptoms such as drowsiness, loss of appetite, and lowered vitality; prolonged high fever may even damage the nervous system and leave sequelae. Finally, respiratory infections that are repeated or left untreated for a long time may turn into chronic diseases such as chronic bronchitis or chronic pneumonia, thereby affecting the dog’s quality of life and life expectancy.