If none of your dogs is house trained at their ages, I would strictly limit where they can do in your house and consider belly bands or sure. (sarahwilsondogexpert.com)
Yes, some of these sound like he may not be house trained yet, but these are also signs of a different problem. (caninejournal.com)
Just like with babies and diapers, they're not cheap, and we typically need them until the puppies are house trained at around 10 - 12 weeks. (adoptapitrescue.org)