"Nelly" wrote
Large dogs need to have nails clipped often. They can scratch the
surface of some wood flooring material. Happened to a previous
neighbor.
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Problem, Oren?
I've yet to see any dog damage to a floor that can compare to that of a
5'8", 125-lb woman walking around in what amounts to nail punches.

Depends on what you've seen. Heels make them tiny indents, but dog nails
can scratch the hell out of the surface. Neither one belongs on hardwood.