There are couple of ways to do this. However, housetraining a dog or puppy is extremely simple to do — but it’s not easy for most people. That’s because it takes patience, attention and consistency. Not everyone who adopts a dog is ready for this.
The key is taking your dog outdoors many times a day (especially at the times when you already know he is likely to have to potty) — and, at first, keeping your dog under strict supervision (or safely enclosed in a crate or exercise pen) the rest of the time.
Every time you take your dog outside, watch him carefully. The moment he begins to eliminate, praise him. You can also use a word or phrase that will become his cue to go potty, such as “Go potty!” When he finished, make a big, happy fuss and give him a treat. Good dog!
Notice I said, “take” your dog outside. If you only “put” your dog outside, you won’t know whether or not he went potty. You lose the opportunity to praise him for going potty outside — and you have no guarantee he won’t come inside and immediately “go” inside, where (after all) it’s warmer and more comfortable!
It can be a hassle, going outside in the dark, cold, or rain, but it’s an essential part of doing this job correctly.
After your dog has eliminated outdoors (both number one and number two), it’s probably safe to let him play in the house for a short time with less supervision. If he failed to do one thing or the other outdoors, then you should either put him back in his crate or pen, or keep an extremely close eye on him for the next half hour or so, and then bring him back outside again.