Training your dog to go potty outside is hard enough, but what if you need to leave your pup alone at home for hours at a time. You can't leave him kenneled for this long on a daily basis as it is not healthy. Your pup will not pee or poop in his kennel unless he has no choice, just as a wolf will not defecate or urinate in his den. One way to deal with this is to train your dog to use fake grass both indoors and out.
By doing this, you can teach your pup to do his business on a small piece of fake grass that is placed in a specific place in your home. Not only will this keep any messes he might make all in one place, it will allow him to be free in your home instead of caged up for hours at a time. The same concepts can be applied to help your dog adapt to using artificial turf outside in your yard, if necessary.
The concept is to teach your pup that it is only okay for him to relieve himself in your home when he does so on the fake grass. The only real problem with this is that if you have already trained him to go outside to go potty it can be hard to train him to do so in the house. This is a big change for both of you, who have worked so hard to get him to go outside.
The best way to make this training stick is to pick one location in your home to place the fake grass and leave it there. Moving it around will only confuse your pup and make it that much harder to successfully train your pup. Be aware that it can take your pup a few weeks to master this skill and not forget how to do his business outside when appropriate.
Start training your pup during a time when your house is nice and quiet. It is so much easier to train when there aren't any distractions. Be sure to choose a spot in your home with a hard floor, not carpet. It is possible, at least in the beginning, that your pup might miss the fake grass from time to time and his urine may soak through onto the floor. You will also need a few supplies, including:
Once you have all supplies gathered, the only thing left for you is to commit to the time needed to work with your pup several times a day until he masters this skill. The good news is your pup is very smart and loves learning new things, make use of this along with plenty of treats and he will soon know where to go potty when he can't get outside.