Hi Pugdaddy....A Senior dog Coughing at night or early morning (After laying down) is indicative of CHF (Congestive heart failure)......Don't panic! This condition is very common and can be controlled for years w/medications....An EKG is the place to start.....If your Vet is not able to provide one, then you need to see a Canine Cardioligist....Let us know what the Vet says & good luck.....Karla
I found the same information after hours of research on the internet. Thanks for confirming my suspicions. I have an appointment with my vet for an EKG. Take care.