I was always told that the last few weeks the litter is together are when they learn bite inhibition. Since your puppy is only 7 weeks it has missed out on that as 8 weeks is best to leave the litter.

SO it is going to take a while to train the puppy not to bite.

Try putting a baby gate up and when the puppy gets too over the top, put her out the room to calm down.
Never give her attention when she is hyper it will encourage her to keep doing it.
I think ignoring a puppy to them is the worst punishment because they love human attention it is also alot kinder than shouting or hitting etc (not saying that you would)

Don't give the puppy all her toys at once, have a few out at a time and rotate so she is geting 'new' things all the time.

German shepherds have good noses so to keep her mind stimulated hide things for her to find it will tire her out more.

x

__________________