Pet ramps or pet stairs are great for pets that are injured, elderly, or unable to climb up to where they want or need to be for some other reason. Vets recommend pet ramps for pets with osteo arthritis, orthopedic problems, hip problems,  or shoulder, leg, or back dislocations.  Pet ramps are mostly used for dogs. The characteristics that one should before purchasing a pet ramp include:

1) Portability requirements,
2) age of your pet
3) mobility of your pet
4) how and where you intend to use it
5) the tread material

In a shell, pet ramps are an ideal solution for getting elderly or injured dogs in and out of the car, roof or basement without putting extra strain on your back.