Unfortunately, there is no magic length of time or milestone age when a puppy can be considered fully housetrained and there are many factors that go into how quickly a puppy can be potty trained. Your puppy’s age plays a major role during the initial phase of potty training, as a very young puppy won’t have the muscle control necessary to hold it for long periods of time.
One of the biggest predictors of a speedy potty training process is owner diligence. If you’re on top of your puppy’s schedule and you stick to a strict prevention and supervision regiment, you should be well on your way to potty training success within a few months. You can consider your puppy almost fully housetrained when you’ve gone an entire month without a single accident, but keep in mind that potty training is an inexact science. It’s best to have several dry months before you can really trust that your puppy understands the rules.
While indoor elimination solutions like potty pads and litter boxes have their place, using them can actually slow the process down if you plan to eventually have your dog eliminate exclusively outside. Teaching your puppy to potty inside sometimes and outside others can be confusing because you will eventually have to teach your dog that at some point the indoor option is no longer allowed. Potty pads work best for people who can’t get their puppy outside quickly, like those who live in high-rise apartments or have limited mobility.
It also helps to teach your puppy a “potty phrase” when you take him outside for a bathroom break. A potty phrase is a way to gently remind your puppy what he needs to do when he’s outside. It’s a big help during the potty training phase of puppyhood and you can continue to use for the rest of his life. Pick a phrase like “hurry up” or “go ahead” and say it softly right as your puppy eliminates. In time your dog will associate the phrase with the act of elimination, so you can say it when your puppy gets distracted and forgets what he needs to do outside.
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.
If your dog isn’t giving you an obvious signal that they need to go out (like whining at the door) I suggest teaching them to ring a bell when they need to go outside. Some of the other signs dogs give that they need to go out such as pacing around or circling can be easy to miss if they’re in another room, which is why a noise based signal such as ringing a bell can make things easier.
The process is the exactly same for older dogs as it is for puppies; prevent accidents from happening by using baby gates and a crate if possible, create a predictable schedule, learn to recognize your dog’s potty signals, accompany your dog outside and immediately reward for all outdoor elimination, properly clean any accidents and supervise your dog until you’re sure that he understands the rules.