
Hi Clare,
Please don't despair, I think you're jumping too far ahead by worrying that a 10 week puppy is dominating your older dog - almost all normal, healthy 10 week pups, regardless of breed, gender etc are pretty nutty ;-)
I agree with other posts that your older lad needs some space, distance and also quite a bit more time to adjust to the latest arrival. Despite your lab x being a quiet and docile soul he will more than likely have a new best friend in this puppy and go on to find him a great source of play etc. - it just takes time all round
It may take another few weeks but your other dog probably will eventually tell him off - just that being such a mild mannered chap he's not felt it appropriate yet <LOL>
Give them both lots of attention individually - this will avoid your adult dog's nose being out of joint and also give the pup some one to one training, socialising etc and all important bonding with his human family.
A crate is an excellent way to give the pup his own space while ensuring your older dog doesn't feel over crowded. Train the puppy to enjoy his crate with toys, feeds etc in there - he'll begin to see it as a nice and comfy place to be :-) :-) :-)
Wishing you the best of luck - and remember, enjoy this puppy nonsense, it really doesn't last as long as we think!