I'm leaning towards bamboo. I have no idea what is under this old carpet, but my greyhounds will probably get down that far very soon. Refinished hardwood once, don't plan on that again!
Another option is engineered flooring, which is sectioned plywood with a top ply of hardwood and a factory poly finish.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk