My funny story of the day

So this guy shows up at my sheep farm and asks if he can predict with exact precision the number of sheep I own will I give him one. I said sure. So using his mental heuristics he surveys my herd of sheep for a brief minute and says "853" sheep. I was floored!! In less than a minute he guessed it correctly. So i told him to pick a sheep out. Being the challenging person I am I reversed it. I asked if him if I can guess with perfection his profession, I can get my animal back. He said sure absolutely. So I thought for about 10 seconds and I said you are an economist with the fed. he was completely surprised with sheer amazement. How did you know that he asked? I said because you picked out my dog.