The whole when you take them home thing gets complicated, but in general I don't see anything to worry about with pups taken at 8 weeks if they come from a good breeder with good environment. 7 Weeks is getting iffy and 6 weeks is even more of a problem...they go through a lot of socialization learning at that age and if they are pulled away from mom and the other pups they are more likely to treat you, your wife, kids etc. as a pup in the litter. If you watch pups in a litter they are constantly harassing each other, testing each other, play fighting, etc.
However I don't see this behavior as being all that abnormal particularly since it seems it may have been supported here.
It's pretty simple as others have said--don't hit the pup, don't yell at the pup, don't think that some magic lead or collar or cord work will help (it may but that can come later with a pup as young as this)--just don't support the behavior! They really want to play and be with you. When they learn that doesn't happen if they bite, jump on you etc. things start to improve in short order.
This goes for the whole family, so if kids are involved--if you can't trust them to do exactly as you say--they should not be with the pup unless you are right there with them to supervise. Dollars to donuts your kids have not helped you in this situation if they have been playing with the pup.
I've done a number of things. Having something they can chew on safely around all the time helps sometimes especially if they are teething, the little tike can't be blamed for wanting to mouth something then. If they want to bite you, no matter how hard--saying "ouch" loudly (even if it doesn't hurt) and if they do it again, put them down and walk away works with some.
Some will still chase you and nip at your heels. If they are still real buggers I'll pick them up, hold them up in the air with their feet dangling and with no way for them to turn and bite until they settle down. NO excited talk, be calm and use a soft voice the whole time. Set them down when they settle down and sit down with them again. If they bite again, I might try hoisting them up again once more but if they keep at it, no more play for quite a while, into their kennel they go. Again with no angry actions or words, just calm and cool.
Takes a bit longer with some of the more aggressive pups, but those can be some good ones when they mature--it's worth it!
You mentioned Willow Creek--is this one of their pups?
