Species of wood that is best for dog owners?

Q: I was considering putting wood flooring in my home, my question is –  What type of wood flooring is best for dogs to walk on and not damage?

I have a Bulldog to two German Shepards who all seem to nail-walk on the tile floors.

A: I would suggest an oak floor because the heavy grain pattern tends to help hide claw marks. I would also suggest a penetrating oil finish over a top coat. The product I have in mind is Waterlox. www.waterlox.com
It is easier to maintain and re coat.