Our medium sized girl Millie was a rescue pup and we have always wondered about her lineage. She is very quiet and calm, about 45 lbs. Appropriately, she has a ? on her side.
I know this breed (The Millie) since I have one, too.... a main trait is their long-sufferance of whatever we Human Persons fling their way. As an example, here's my "Millie" making the best of the fact that her water dish froze overnight on one of our recent trips.