Thanks for the replies - we have tried giving toys etc in place of us, but she ignores them, even if we physically put them in her mouth!
I'm glad its just normal puppy stuff, my god she bites so hard she has drew blood several times (on different occasions). Its like she gets herself so worked up, this mad look comes on her face and she just has to bite! She even jumps up and bites immediatly after waking up from a nap! very strange girl...
I will try putting her on the floor if she bites us when sitting down and ignoring her, but does anyone have any tips for getting her to stop biting feet when we are walking around? As mentioned, chew toys etc just dont cut it (we must have tasty feet!)