Feroz

Feroz is a Spanish fantasy movie. It was directed by Manuel Gutiérrez Aragón. It was screened in the Un Certain Regard section at the 1984 Cannes Film Festival.
Plot.
Pablo ("Julio César Sanz") is a strange man who is lost in the forest. One day he is saved by Luis ("Fernando Fernán Gómez") from being attacked by several wild dogs. However, that "man" has the ability to become into a bear, which is why dogs are aggressive toward him.
Luis, as a psychologist, takes him to Madrid so he can learn to live into the society.