I don't see how it would be any more "waterproof" than laminate flooring. Either of those are fine. Tile throughout is another option. I personally have hardwoods throughout the house (kitchen included) and as long as the poly finish isn't worn off, it does just find with dog wetness.
J, mom to:
- Elsa - "Da Pookins"
- Medo - "The Beast From The East"