Older dogs or dogs with poor waist and legs can use pet stairs or slopes to help improve the inconvenience caused by height differences in the home and protect the dog's joints. However, pets and humans have very different needs for ladders, and the height, width, and material suitable for steps vary according to type and body type. In addition, the products on the market are subdivided into foldable and stowable types, which can’t help but make people confused. Know where to start.