I finally dared comming back here to see how it all went... Was scared sh*tless, no kidding! So tremendously happy for the both of you, - no - all of you!!
Keep him quiet by letting him use his brain instead of his body. I used empty sea shells; started with one with a treat underneath. When Shacko looked at it while lying down, I turned it and gave him the treat. Then he had to reach out with his paw. Just waited him out, - lying there facing each other.
Then 2 shells and just as he looked at or reached for the one with a treat - turn over and he got it!
Believe me - they catch on quickly!! And a mentaly tired dog is a happy dog :-)
You are just so lucky!!!:)