Your new puppy is a joy to watch and cuddle as it learns more about the world each day. They run, jump and chew on toys with a passion that’s almost endless. Although your puppy is perfect in your eyes, it does have a personality of its own. Both good and bad traits will stem from this personality. Most experts agree that dog obedience classes are critical during the first year of a puppy’s life. There are several reasons for this determination.