Actually I am also a perfectionist. But I tell myself that no matter what I draw, it will suck, compared to what I will draw in five years. You always improve something from one drawing to another. And Thanks Old Rabbit, that link will actually help me. I have a hard time with the muzzle. But I think you should post a few pictures you have drawn, that way we can tell you what you are doing right, and where exactly you fall short. And maybe some of us know how to fix some of your mistakes. Just stay calm and art. Art takes patience in my opinion.