Lyne's Creations probably has the best collection of dog morphs for Poser.

They're mirrored at Lannie's 3D Model World, which also has a bulldog by Doug Margason.

bloodsong has a collection of dog face morphs at her site, 3D Menagerie. They're in the Poser Goodies section.

Jelisa has a german shepherd texture for the Poser wolf at her site, along with a golden retriever, Great Swiss Mountain Dog, and Jack Russel terrier texture for the Poser dog.

Roger has a border collie texture for the wolf here in Free Stuff.