Dog steps exist to spare joints, and that is exactly how we judged them. In our evaluation we found that the difference between a good set and a frustrating one comes down to step depth, total height, and how firmly the structure sits without sliding on hard floors. We compared foldable fabric stairs, foam steps, and rigid plastic designs against manufacturer weight limits and aggregated owner reports on wobble and durability. What we like is a tread deep enough for a full paw and a non-slip base that does not creep when a dog hops up. We recommend matching the top step to your bed or sofa height so your dog steps across rather than leaps, which is the whole point for seniors and small breeds. For any dog with mobility issues, we suggest checking with your veterinarian about the best approach.