@Gabriel:
I brought Noel home at 6 week.
When puppies play with each other, they learn that if they bite another puppy too hard they hurt it. The puppy learns to control the amount of pressure it uses on another puppy, and on humans, this way. It is called bite inhibition. Noel was taken away from her siblings and dam before she learned bite inhibition and this is why she is so rough with you.
FWIW, when I did Basenji rescue work, virtually every biter I dealt with was removed from it's dam and siblings prior to 8 weeks of age.