My friend Jen, a fellow NSD Breeder-Caretaker (Equoia) is my right hand woman when it comes to nail trimming. The puppies dig in their paws when nursing and it can scratch Momma's belly. We usually cut nails about once a week. That's 36 sets of feet to trim. The pupppies are placed in a baby bath tub warmed with a heating pad so we know whose turn it is. They get their pedicure, then go back in to the whelping box. I don't handle them much at this age. It is up to Mom to take care of their needs.
As long as the puppies aren't squirming, it goes pretty well. Nails were first trimmed on Tues. Feb 14 at 6 days of age.