To answer the question in the simplest way, the wolf has a backbone.
However, there is more to it than that, especially given that there are two invertebrate chordate groups - Urochordata (tunicates) and Cephalachordata (lancelets) - whose backbone is not in the form of actual vertebrae.
As Chordates (or members of the phylum Chordata), wolves share the following characteristics:
Dogs are in the Chordata phylum, therefore Pit Bulls are in the Chordata phylum.
Birds belong to the phylum Chordata, specifically the subphylum Vertebrata. This means that birds are vertebrate animals with a backbone.
Chordata phylum
Phylum Chordata.
The phylum of a stingray is Chordata.
The phylum of a dove is Chordata.
chordata/chordates
Cows belong to the phylum Chordata.
The eagle belongs to the phylum Chordata.
A llama belongs to the phylum Chordata.
Apes belong to the phylum Chordata.
Vultures are found in the "Chordata" Phylum.