The room we were given, had a shower within the bath-tub enclosure. The ad also stated it was 'pet friendly', though I am unaware if there is an additional fee for such.
Red Roof Inn does not charge a pet fee. We've stayed in several with our dog with no additional fee. I would call ahead just to be sure - they're one of the few "budget" hotel chains that are pet friendly, so we typically use them when we travel with our dog. Our room also had a bathtub.
Get an answer from Red Roof Inn Hillsville staff and past guests.