I just trimmed Romeo's nails rewarding him with a morsel of kibble after each nail. He knows the drill. Lulu was close by and I clipped a few of her nails too. This is good news since last time I accidentally took off too much on two of Lulu's nails. She hadn't noticed but I had and felt terrible.
Having a puppy watch an older, calm dog get their nails clipped is an excellent, natural way to introduce them to the process. Puppies learn through observation, and seeing a trusted older dog remain calm (or get rewarded) during grooming sets a positive example and reduces anxiety for the new puppy.
