Wolf hunting with dogs is a method of wolf hunting which relies on the use of hunting dogs. While any dog, especially a hound used for hunting wolves may be loosely termed a "wolfhound", several dog breeds have been specifically bred for the purpose, some of which, such as the Irish Wolfhound, have the word in their breed name.
Any dog breed can hunt wolves.
According to the context, any type of dog used to hunt wolves can be labelled a wolfhound. While it is probably unlikely that some breeds are used, theoretically, per the context of the statement, any dog could qualify. The model probably struggles with this because it knows that some small breeds of dogs probably would never be trained or used to hunt wolves.