Trying to teach a dog a trick takes practice and a great deal of patience. He does not understand "left paw" no matter how many times you say it, no matter how angry your tone. When he thinks you are finally playing with him and you storm away angry he does not get it. Throwing his treat away because he didn't do what you want and then ignoring him is childish and pathetic. He does not understand why you are acting this way. Grow up and start acting like a decent human being.
