Getty ImagesDorling Kindersley Housebreaking. Of all the training that needs to be done with a puppy, this is the most daunting. What’s worse than having to clean urine and excrement off the floor (hopefully only the floor) of your own house? But housebreaking is actually the easiest part of training when you think of all the other things dogs can do that will drive you crazy (see barking, chewing, nipping) and are much harder to stop. Take it from a lifelong dog person.