In any case, it is commonly believed that dogs descended from wolf lines.
Anyway, some facts on wolf and dogs in general for those who may be interested like me, to expand the Vargr story and there lineage.
The domestic dog (Canis lupus familiaris) is a subspecies of the gray wolf.
Humans are believed to have created the first stone axes more than 350 000 years ago. [Not relavent to wolves but helps to see enhance the possibility of the 400 000 year ago wolf domestication].
http://www.dailymail.co.uk/sciencet...stone-axes-350-000-years-earlier-thought.html
Technically there should be at least 38 different races, depending on if the ancients took one or more of each of the 38 different species:
Among true wolves, two species are recognized: Canis lupus (often known simply as “gray wolves”), which includes 38 subspecies, such as the gray, timber, artic, tundra, lobos, and buffalo wolves. [
http://facts.randomhistory.com/interesting-facts-about-wolves.html]
Finally a very interesting site which strongly suggests that domestication of wolves occured as early as 400 000 years ago along with some other very interesting information.
http://www.responsibledog.net/evolution_domestication.html
This strongly suggests that domestication was around a lot longer then we seem to believe. While actual domesticated dog bones date back to currently believed 31000 years or so, the actual date on when the wolf lines cross bred to eventually create dogs is still unknown. In fact the wolf has been an historical mystery in this regard. There are estimates but no clear point at which the strains which evolved into the early dogs began.
For this reason, I don't believe you can say dogs(I'm talking early dog, very similar to wolf) are not part of canon Traveller Vargr. Would the earliest dogs not have been very much like wolves(if not looking identical)? Yes I know, we wouldn't call and Astralopithicus man, a modern day man, but as the generations that proceeded it progressed, the line blurred. Even to this day, we are still evolving with skull sizes shown to be increasing with time(one day we'll probably look that scary race from those early Star Trek episodes with the big heads). There's a lot of time between 400 000 and 300 000 years ago, even 350 000 and 300 000 years ago. A lot of possibilities in that space of time.
As an area of mystery to this very long admired Traveller race, I think it would add a great deal of depth to expand upon the Vargr in terms of there races.