The other posters are right, she is too young to be away from her mother and this is now up to you.
I was in the same situation.. I brought my Poppy home at 6 weeks (I was told she was older) and the biting is a nightmare.
If she had of stayed with her mom until 12 weeks her mom would have taught her bite inhibition but unfortunatley its now down to you.
What I find works is a firm 'LEAVE IT' ... I tried the NO and the yelping but it wasnt working, when she picks up things she shouldnt or chews her pad I have always shoated LEAVE IT in a deep voice and she stops.. so I started doing it when she was biting and its working, she still bites but its not hard (just mouthing me).
At this age you cant stop her biting all together because she is teething and it will be frustrating for her, but you need to teach her how hard is acceptable to bite.
You can get a bitter apple spray to put on your hands and toes which might help, or you could try spraying her with water when she bites. (neither of these methods worked for me but they may work for you).
Also when she gets really bratty I would recommend you put her back in her crate/pen and leave her for time out. Only get her back out when she is calm. Good luck!
__________________  Rachael & Poppy |