My 8 year old Doberman passed away on Thanksgiving night/ Friday morning.
Read about it here
I know there are a few Doberman owners on the site, and I highly highly recommend you research bloat. It's rare, but serious. Knowing the symptoms could very well save your dog's life. I wish I had even heard of it
A completely healthy dog can die within an hour. And it's widely debated what causes it. No one really knows.