Hello, my 7 month old dog has had a cough for about two months now. Every now and then she will make a hacking sound as if she trying to bring something up. This usually occurs with some exercise as well as when she is sleeping. I took her to the vet about a month ago and all they did is check if there was anything stuck and said she’s fine. Now she continues to couch.. I was wondering what may be wrong with her.