Potty training

[Mikayla]

Does anyone have any experience with potty training dogs who likely came from puppy mills? Our dog Franklin shows a lot of the characteristic signs, although we've had him since he was 16 weeks old. He poops in his kennel (not at night, but he will any other time) and only on concrete. He also has an issue with submissive urination. I'm tired of the amount of ignorant running around our house, and since I'm the only one who seems to care about Franklin, I think its time I make a potty training plan and tell them to follow it or shut up. *sense the frustration?*

[GhostsInSnow]

I don't know what to suggest. Our puppies aren't puppy mill puppies but they were born in a rescue place and we got them from there. with the weeing, we put puppy pads down in the places they were having accidents and then moved them a bit closer to the door each time until they learnt to go outside. They also pooed on them as well so it worked for both.
The only real time we get accidents in the house now is if they haven't had their walk when they normally have it and haven't been able to hold