Dog Cough Mucus Bad Coughing, Mucus, And Sneezing In Dog?

Bad coughing, mucus, and sneezing in dog? - dog cough mucus

My dog had a terrible cough with mucus and sneezing. We took him to the vet and has no allergies. They have taken steroids, but it seems only for one month at a time to work. There is another option. Please, if anyone knows what can I help my dog with you is a big relief for my family. And it took a long time, so it does not kennel cough.