Watch out for a cough! The upper respiratory tract of a dog lungs, bronchial tubes, throat and sinuses are often weakened by various viruses, also by bacteria, and by the cold season. If the dog sports a runny nose or makes coughing noises, its immune systeme is in dire need of a booster to stimulate the bodys defence mechanisms. Preventatively, the dogs diet can also be supplemented with high-quality natural resources such as those contained in IMUN Dog® Resp.