My elderly dog started having trouble keeping her back end upright while walking and was dragging her feet, causing injury, so I bought her a pair of boots to help keep her stable — especially when indoors on hardwood floor. The extra grip has helped immensely and she took to them on the first use, which must be a testament to their comfort.
If they've been on a while they do occasionally slip below her dew claws and have to be readjusted but it's so easy to do it's no bother. Her feet are now scrape-free too so she's much more comfortable!