This is a challenge because Rallo was beaten for going in the house, so he must be confused and scared. My Teddy was 100% outdoor trained when I brought him home at 8 months, but I needed him to be pad trained too.
You can successfully retrain Rallo, and I commend you for going to great lengths already to do it, and for being patient.
My biggest challenge was convincing Teddy to poop indoors on the pad. I put baby gates up to section off a small part of a back hall. You could use an xpen. I lined the area with piddle pads and put Teddy in the penned area when I knew he had to go. It was heartbreaking forcing him to do something he didn't want to do. He finally couldn't hold it any longer and pooped. I praised him like crazy, did happy dances, hugged him and gave him a treat. When he saw how excited I was, he finally knew it was okay.
I would try this with Rallo. It will probably take repetition before he gets the hang of it and then you can go back to one pad. It will probably also be time consuming for you, taking a lot of supervision. I would use a really yummy treat.
Wishing you the best in helping Rallo.
__________________ Kristin, Max and Teddy  |