We adopted a dog because we knew he would bring kennel cough into our home. He was on death row and we just had to save him. Because we couldn't separate two dogs who were keen to spend time together, we began giving our healthy senior dog this medication the day before the foster family arrived. Thank you Prime Shipping! Immediately after we entered our home, the adopted dog coughed right into our old pup's open mouth, licked his (empty) food bowl and snuck up to drink from his water. Despite an intensive exchange of microbes during the week, our 14-year-old dog remained perfectly healthy and never developed a cough! I am sure that this immune stimulant played a role. As for treating existing kennel cough, I'm not sure how quickly it would work. The adopted dog was taken to the vet for an initial check-up and was immediately prescribed antibiotics and a cough suppressant. Kennel Koff includes a warning that your dog should not take it while he is on antibiotics. Therefore, the adopted dog did not take this medicine. But when it comes to prevention, I support this product 100%.전체 리뷰보기