They aren't supposed to be nursing at 5 weeks. I pull off mom at 4-5 weeks, regardless. They STILL need to be with their littermates to learn bite inhibition and how to be a dog. REFUSE to let this person give the pups to new homes at this age!! They are simply being lazy, because they need to step up and start cleaning up after the pups. It is also usually illegal to rehome before they are 8 weeks of age!
Puppies are hard work, and this person needs to have their dogs neutered if they're not up to the task.
BTW- Welcome to the forum, and feel free to start your own thread introducing yourself.