Teach your dog left from right. Believe it or not, it is possible to teach your dog the difference between right and left. This is a cool trick that is quite simple to teach through repetition. To teach this trick, stand behind your dog and say “left” as you toss a treat or ball to your left. Repeat this with left, until you only need to issue the command, without tossing a clue. Reward your dog with heavy praise and treats. Next, move on to “right” in the same way. Teach one, and then the other so that your dog does not become confused.