Dog Ramp Pet Ramp Adjustable Heights PortableMake it easy for your dogs and other pets to travel with you with this portable, adjustable pet ramp from Randy Travis Machinery. Whether you use it indoors so your pet can crawl into bed with you or help your pup get into your car, this ramp is a must for pet owners. For senior pets, a ramp is easier on the joints than pet stairs since it's a steady incline. Its adjustable height allows you to use it with a wide variety of vehicles or other uses.