Pet Care, Toys, Supplies and Products for Animals Design TriPawd Dog Wheelchair by Dosun Shin TriPawd is a wheeled-based assistive device that allows handicapped dogs who lost one of their front legs to jump on and off without any strapping mechanisms or the owner’s assistance. Two rear wheels improve both the stability and mobility of the device, while a front wheel on the metal tube frame connecting the two wheels provides support for the chest cup. The bent metal frame provides space for the dog to walk without any interference of the front leg. The pole is height-adjustable and straps are optional to attach for outdoor activities.