Loki is completely potty trained. He rings a bell when he needs to go outside and we crate him when we are not home. He goes with us to other people's houses and does just fine - no bells but he goes to the door and scratches or cries. We don't have a fence so he goes outside on a leash. He's 2 this week, and he's been reliable since he was about 10-12 months. I can't remember the last time he had an accident.
Poor Loki has some bladder issues and incontinence that is being controlled with meds. We have to regulate his water because if I put a whole bowl in front of him he would drink the entire thing. (I know puppies pee a lot, but he was having accidents every 5 minutes at 4 months old and it was NOT marking.) We ruled out any medical cause for the water thing but he still drinks twice as much as he should. I told him a long time ago he could have as much water as he wanted as long as he peed outside!! So far he has kept up his end of the deal so I try to keep mine