Thanks for that. Is there any set info on when I can start ramping up the exercise? My big fear is a bored dog, and trying to balance boredom / destruction / over-exercising.
You could try also to tire him out by mental activities such as treat balls, scattering some of his meal in a few square meter patch of the garden and making him "find it", hide and seek where he finds you! Does he like swimming? You could have him on a long line! Or a kids paddling pool in the yard for him to splash in.