Hi Barry good to see you again
I'm no expert at things like this but my dog trainer always says you should never just take something from a dog, you should teach them to "give" it to you. If you just take something you can inadvertantly teach them to guard things.
I started to do this by calling Poppy to me in a happy, cheerful voice (you can fake cheerful whilst gritting your teeth
) and having a treat in one hand (or something that the dog would want more than whatever it is they've got) and show the dog the treat and get them to focus on that. As you take the thing from the dog with the other hand say "give" and as you are taking it give them the treat and praise them in a happy voice. You are aiming to reward the dog for giving something to you.
My dog quite quickly realised that "giving" something to me when I tell her brings a reward and usually gives things back no problem.
Hope this helps, sounds like George is hitting the teenage stage - poor you
Fiona