A friend's drunk roommate is a bitter drunk. He shaved the top of my friends dogs head. What are options if any?

Call animal control or Sheriffs office.

I'd contact the spca directly in largo fl

Take pictures and call the spca on how to move forward from there? If spca isn't much help call the humane society. Once they've advised you on your options then call the cops.

I would call cops on him. Call SPCA in Largo to see how they can help.