Refinishing wood floors can sometimes reduce the appearance of pet stains, but deep stains and odors often penetrate below the surface into the wood fibers. In such cases, sanding alone may not fully remove them, and affected boards might need replacing. Just like how a PET scan breast cancer can detect issues beneath the surface of the body, addressing pet damage in floors requires looking beyond the visible layer to ensure the underlying problem is resolved. Using specialized odor-neutralizing treatments before refinishing can help achieve better results.