Well it hasnt been quite a week yet, but i figured it was time for an update. Things have been...challenging, with Scooby, to say the least. We've been attempting every solution i can think of, and i've been in constant contact with his caregivers from the shelter, who are giving me lots of good advice.
Our challenges mostly have to do with him peeing in the house, sometimes right after coming in from 15 minutes in the backyard, and me (and everyone else in the house) not getting enough sleep because its such a process to get scooby up, guide him to the backyard, wait a while, guide him back into the house, then coax him to lay down and sleep instead of pacing around the house for an hour. We have an extra large wire kennel that he's confined to when we're not home, but he barks incessantly in it, so its not an option for overnight.
I expected the occasional accident in the house - it certainly wont be the first or last time that happens at our house. But when we're home and awake i make sure to get him outside EVERY HOUR for potty breaks - but he will still come back inside and pee on the floor. Argh! Same at night - i will get up once or twice in the middle of the night to get him outside, but will still catch him peeing on the floor when he comes back inside!! We do have a doggie door too, which he uses to go outside on his own, so he has had PLENTY of opportunity to do the right thing. I think it comes down to the conditioning he's had the last 5 years while living at the shelter - its ok and normal to pee inside.
I'm pretty patient, but there is the possibility that Scooby may fray my last nerve (one night i only got 2 hours of sleep, that came close!). His shelter caretakers are perfectly willing to take him back, even happy to drive the 4 hours round trip to pick him up, if it doesnt work out, which is really nice of them. We're going to give it another week or 2, i know it takes a while and i want to give him every opportunity. I think if we decide to have the shelter take him back, it will mostly be because he doesnt seem all that content or happy here - i'm not sure if his behavior was that much different at the shelter - they did mention that restless pacing was normal for him there. But if he's not happier being in a home environment, then i can't see any reason to be loosing sleep and constantly cleaning up pee!

I'll let you all know what happens.