So many very young puppies and under socialized lacking bite inhibitions from leaving their momma too early.
What's done is done so now you need to deal with breeders who do not car enough to keep these babies longer.
I am going to suggest something that I saw on TV just last night and found it very interesting and I am going to guess it really will work. This trainer suggested using a frozen stick of butter and put it onto your hand. When the puppy tries to bite it will lick you instead. I'm not sure what else would work if you tried all of the other suggestions. Let us know how or if it works for you, Good luck
