there's no age set to have your dog potty trained by. It depends on the dog and the owner. You say that he doesn't pee in his cage? I had a bit of a problem like this with kai. He would pee anywhere anytime (excluding his crate). Firstly, make sure the scents are entirely covered. I used vinegar/water 50% each. I also used other stuff once in a while. Make sure your pup doesn't see you clean it up. My vet told me that if he sees you, he'll make it a game and try to do it more. Right after he comes out of the crate, BOOM straight to go pee. You could try taking him out more than once an hour. I thought it was weird to take Kai out 4 times in an hour but it helped alot! Also, what I did was when he peed outside and pooped, he got a treat and lots of verbal praise. When he peed inside, very stern NO! I put him in the crate after he pees so he doesn't see me clean it and it's like a punishment. Also, make sure that he's always with you. Everysingle second he is out of his crate, he's with you. A good way to enforce this is by attaching his leash to your belt loops. This way, you can make sure that he's with you 100% of the time. And remember, no punishing if you didn't catch him doing it.