Long ago I read a paperback novel that was written before 1981 (I'm guessing sometimes in the 60s or 70s).
The story was written from the main character's point of view, who was a human male who could transform into a werewolf. When in wolf form, the author described what the wolf was feeling, such as the scent of a rabbit, a cow in estrus, and the feeling of speed and power as he moved through the fields.