Hi I have a 10 week old black lab pup, male, and he is so very agressive I am almost at wits end to get his behaviour under control. He challenges everyone, snaps, growls, bites hard enough to draw blood. Is there anything I can do to get this pup to submit? I have never seen a pup like this in my life.

Have you been back in contact with the breeder of this pup? If not I think you should.
Growling and biting to some pups is how they play with their littermates could it be that he is playing and treating you as one? or is it real aggression?
If you can email me on labrador.rescue@btinternet.com I can arrange to talk to you direct then I can build up a clearer picture and help you better