These are the wargs of the Hobbit. They talk, they are organized. Those lizard Hyenas were one of the things I hated most about the movies. It is worth noting that for my game the Books ALWAYS OVERRULE anything PJ did. Sorry, thanks for letting me get that out.
These Wargs are far brighter than any dogs in the party. Think back to the Hobbit for your answer. So both Hobbits and all the Elves and Ghân and Gwaelur and Gilraen and Lorli would be able to tell you they are pretty much near human intelligence.