Absolutely, the best person to advice you is the current physiotherapist treating him. You should go to the treatment sessions and feel free to ask as many questions as you want.
The home program constantly changes with the progress of the condition. You cannot expect us to tell you what to do, especially as we are not sure of how your husband's current state is.
I am sure you are really concerned for him and want to help him as much as you can... so go with him in the next treatment session and feel free to pick on the physio's brain
;-)