So here's the latest on the potty front:
Jack's there. He's staying dry, he's yet to poo in the potty, but he is about 90% there as far as p/t goes.
We decided to back off on Summy. He was just having so many accidents, and I felt like I was tricking him into sitting. I don't think he has the muscle control yet. Also, with the therapy, he has started to unravel. He's been stimming a lot and has been very vacant/absent. He's also been highly agitated. This is normal, but I think p/t might be too much right now.
I plan to retry in a month or so. He's still sitting and having successes, so that's good.
We're hoping to call a developmental psychologist this week and sit down to meet about Sumner.