Born and raised in California; I’ve never heard the term before this thread. I don’t believe I’ve ever seen such a house in person.
Living in the South, I’ve heard of them and seen a few very old ones; they’re not something that generally gets built today.
Another Californian that has never heard the term. I’ve also lived in Colorado, Texas and New Mexico a bunch and I’ve never seen anything like the links.
Oh, yes heard of Dogtrot, Dog run, Shotgun. All over the south there are examples. Modern adaptation, IMO, is a breeze-way between house and garage. Tired figure one into our house plans. No luck.
ETA among the many things I got laughed at, about when we lived in the UP was saying “I’m fixin’ to go over there”
If you’ve seen, “The Yearling,” you’ve seen a dogtrot house. I think Gregory Peck was building it at one point.
I think my 1849 farmhouse may have started as a dogtrot. It has two rooms on either side of a central hall that opened to the outside at both ends. The kitchen was a separate building until 1961 when they added indoor plumbing. Each side of the hall has it’s own chimney. One side has a 2nd story with 2 connected bedrooms. The stairs going up are enclosed and wind up beside the chimney.
StG
I’ve run across “dogtrot house” in my reading, so I know what it means.
It’s a city in Iowa, but that’s not important.
It’s a type of sofa, or couch.
Never heard of a dogtrot house, but I like the idea… climate permitting.
Never encountered the term or the structure, but I’ve also never lived in an area where cooling was more important than retaining heat.
Google Dog Trot cabins, they were pretty common in the South.
Example
https://images.app.goo.gl/XrUEWGWECV88eYLH6
I remember seeing them from the road on trips with my parents. They were usually in rough shape and falling down. I haven’t seen one in at least 30 years.
I only know the term from watching the Barnwood Builders show, where they save and rebuild/repurpose pioneer cabins.
I had never heard the term.
Never heard of nor seen one, despite living in an area where they might be found. Will have to keep an eye out.
Now shotgun houses I know all about.
Never heard it called shotgun houses - in NYC we call them railroad flats.
I did stop in there once while driving up to Dallas a decade-or-so ago, and also got a picture of myself looking like an ant at the foot of the giant Sam Houston statue over on I-45. One of my frequent fishing spots is along the shoreline of Cedar Point(now called Houston Point), which was Houston’s longtime summer home on Trinity Bay. It was probably not a dog-run, though I have seen it described as a sturdy but modest home with adjacent service rooms. That description may mean something like an old-fashioned summer kitchen a few steps from a house of any style.
I’ve never lived anyplace that didn’t have “Carolina” as part of it’s name, and this is a new one on me, too.
Life-long Floridian here, I did not know the term.
As far as using phrases people don’t understand, I feel like it does happen to me from time to time although I can’t think of a specific example. I sent out an email yesterday to a group of people telling them that our refrigerator was kaput, and I thought I might get some questions about that one, but everyone appears to have understood.
Try saying that your refrigerator going *kaput *left you *verklempt *and see if everyone understands. 
Never heard of the term, or ever seen a house like that. Can’t even imagine it – what would you do when you get snowdrifts through that center area?
but here in Minnesota, there are houses with a ‘summer kitchen’: a separate small building used for cooking during the summer, so the main house stays cooler. Seems to accomplish the same thing.
I thought shotgun houses were different. They’re supposed to be narrow and open, where the DTH seem to be two enclosures with a central breeezeway.