I found out my little puppy has pneumonia. They thought it was kennel cough at first. Any advice on how serious this is? She is playful and eats. Coughing sounds better; she only coughs a few times a day now. I am so worried about her and do not want to give her back for another puppy. She was sick when I got her from the seller. They are giving her breathing treatments right now and hopefully that will help and is on AB. Not sure what to do from there on.... When do you know that the pneumonia is gone?