Train it! As this is your responsibility, not the dogs/pups. Do not allow this behavior to continue, correct immediately each time it occurs. And/or seek professional help for yourself on how to train a dog properly, before someone gets injured, there no shame in seeking help if it's necessary.
Must be a lot of poorly bred dogs out there, as I've never had this issue with any dog/pup in over 65+ years of raising puppies/dogs, regardless of breed or lack of breed.
Many people excuse this poor behavior by calling it teething/mouthing and allow it to continue without correction, thinking it will outgrow it, it won't, it will only get worse, once the dog injures someone/something, family maybe sued, dog maybe removed at the families expense and possibly euthanized.