The John Looney House Museum may be the oldest double dogtrot house in the state.
From the al.com
A second cabin was constructed later, and the two joined by a dogtrot.
From the tennessean.com
The Sherrod's had bought the property from the Hickman family and expanded and added several buildings, including the two story dogtrot log cabin that came to be known as the Sherrod House.
From the en.wikipedia.org
More examples
A steady trot like that of a dog
The dogtrot house is a style of house historically common in the southern United States, apparently originating in the southern Appalachian Mountains.