Dog Cough Ongoing for 2 to 3 Months

by Leslie H. (Selma, TX) Molly Today My 13 year old cocker spaniel Molly has been suffering from a cough for about 2-3 months now. I have taken her to the vet a few times. The vet thought at first that it was a collapsing trachea. Prescribed her Hydrocodone....