The Witcher
Wargs are creatures which were part of the early design for the game, but which were either dropped or, more likely used as the basis for the armored hounds created by the Grand Master.
The Witcher 3: Wild Hunt
Wargs do make an appearance in The Witcher 3 where they are tougher and larger breed of classic wild wolves.
Journal entry (excerpt)
- Particularly dangerous are wargs, a nasty and ferocious subspecies of wolf.