Dear Dr. John, My husband and I went out of town and boarded our two dogs at a private home facility that we have used before. We dropped them off there six days ago. Both of our dogs are up to date on all of their vaccines, including for kennel cough. Nothing was mentioned when we picked them up, but last night our older male dog started hacking and coughing, bringing up very sticky saliva. Our younger female dog started to hack some this morni…