Our dog developed a hacking cough about a month ago, sounds like he is trying to cough up a hairball. I have brought him to the vets three times because we went from thinking he had a cold to thinking he had cancer. Initially he had two doses of antibiotic as the vet found he had an infection. However the cough returned this week and I have brought him back to the vet. This time there was no infection present so the vet could get a good look down his throat. The vet says that he has a hardened larynx and is basically trying to cough his voice box up. He has put him on steroids to see will these work and if not will have to operate, he has also suggested using a cough bottle that can be bought across the counter. Has anyone else any experience in dealing with this and is there anything I can do in conjunction with the steroids to help him along e.g. natural therapies.