Though it differs by each individual dog this is the time when most will come up with their own little way of letting you know they’ve got to go. It might be crying at your feet, ringing a bell you’ve set up or waiting at the door — just be sure to pay attention to these signals & follow up. Once your dog knows how to get your attention when he’s got to go you can relax a little and congratulate yourself on a job well done.
So, depending on how old he is and the size of your puppy, it’s unrealistic to expect him to be potty trained before this time. It will be helpful to keep in mind that your puppy is only able to hold their bladder 1 hour for every month old he is. So if your puppy is two months old, they can hold it for about two hours. Don’t go longer than this between bathroom breaks or they’re guaranteed to have an accident.
Millan's first job in the United States was at a dog grooming store. He later created the Pacific Point Canine Academy. Jada Pinkett Smith became one of Millan's first clients and supporters when he was working as a limousine driver, providing him with an English tutor for a year. Subsequently, Millan created the Dog Psychology Center, a two-acre (0.81 ha) facility in South Los Angeles, specializing in working with large breed dogs.
Dogs don’t speak English, and just because we might yell at our dog as we catch him in the middle of peeing on the floor and then rush him outside where he finishes it off… doesn’t mean we did an effective job at telling him that outside was where he was supposed to go. We are usually too focused on getting him NOT to go inside, instead of going outside.
Once he seemingly has this idea down, move the string of bells to the left or the right of your dog and see if he moves to go and hit them with his nose; if he does click and treat! Next try moving the bells above his head and then closer to the floor. If he is chasing them with his nose in an attempt to ring them, then he understands what you want!
With Ilusión Millan, his former wife, he founded the Millan Foundation – later renamed the Cesar Millan Foundation and currently called the Cesar Millan PACK Project. The foundation was established to provide financial support to animal shelters and organizations engaged in the rescuing, rehabilitating, and re-homing of abused and abandoned animals, and to fund spay/neuter programs to help reduce dog overpopulation. It aims to "improve the health, happiness, and harmony of dogs and people – while helping both species learn from and support each other." Among other projects, the Foundation worked with Yale University to create a children's curriculum based on his work.
Suppose you consistently praise your puppy for their actions, while potty training. Then say your dog has an accident. Do not praise you dog immediately. Instead, take your dog outside and wait for it to go to the bathroom. When it finishes doing its business, take it inside, and keep it in a separate room while you clean up the mess. After this you should act disappointed in your dog, but only for a few minutes. Keep you and your dog motivated to potty train.
Lindsay says of this study, "Schilder and Van der Borg (2004) have published a report of disturbing findings regarding the short-term and long- term effects of shock used in the context of working dogs that is destined to become a source of significant controversy ... The absence of reduced drive or behavioral suppression with respect to critical activities associated with shock (e.g., bite work) makes one skeptical about the lasting adverse effects the authors claim to document. Although they offer no substantive evidence of trauma or harm to dogs, they provide loads of speculation, anecdotes, insinuations of gender and educational inadequacies, and derogatory comments regarding the motivation and competence of IPO trainers in its place." 
Understand your puppy's particular breed behavior and needs. Research your dogs breed traits and special needs or any behavior that you should be aware of and look out for. For example, If your puppy is a tiny little chihuahua, their bladder will be very small and they will need to urinate more frequently; accidents will happen even if they are well trained.
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Sometimes, despite all of your hard work, your puppy might slip up and eliminate in the house. If you catch him in the act, make an abrupt noise to stop him then quickly bring him outside and give him a reward for finishing in the right spot (it’s okay if you take him out and he doesn’t go). Don’t punish your dog for the accident; simply clean it up with an appropriate odor eliminator and vow to watch him more diligently in the future.
Unless you plan to keep your dog outdoors--and few of us do because it's not recommended--you'll need to teach your dog where to eliminate. Therefore, house training (also called housebreaking or potty training) is one of the first things you need to work on with your dog. Crate training can be a very helpful part of the training process. This includes house training as well as many other areas of training: