This is interesting - our 7 month old newfie has just seen our canine neurologist at CSU veterinary med hospital. She was awesome. We are very blessed to have one of the top vet schools in the country on our doorstep and took advantage off it when we knew at 10 weeks that something was wrong with Daisy. Whilst a little small for her age she gained weight well but had a constant rattle in her through like phlegm and coughed when eating and drinking. She never coughed at other times. She became sick with pneumonia and our regular vet referred us thinking mega esophagus or myasthenia gravis. After admitting her overnight to run tests then did xrays and the photos of her swallowing ( fluoroscope I think) and series of blood work. Daisys diagnosis was cricopharygneal upper esophageal sphincter dyssynchrony with craniel cervical esophageal hyper motility. They told us she was unlikely to thrive and ultimately be in discomfort with constant pneumonia from food getting into her lungs that she would maybe only survive a couple more weeks. We are still going strong and daisy is doing awesome she has adapted the way she eats to accommodate her disorder ( initially we fed her upright and this helped gracity take the food down ) and has not had pneumonia since her last outbreak 3 months ago. She is 70lb and 7 months and hardy coughs now, we have a follow up next month so I am interested in what they say. Our breeder was awesome and all the information went to her vets as there must be a genetic link, but Daisys was moms first litter and whilst genetic testing was done there was nothing to indicate an issue from the breeder ( pother litter mates were fine). There was no myasthenia Gravis. If anyone wants to see the vets report I am happy to show anyone going through similar issues.