Balto BT Up Rear Suspensory Handle Description Balto up rear suspensory handle extra large is the ideal support for dogs suffering from problems and pathologies such as arthritis, arthrosis, hip dysplasia, paralysis or semi-paralysis of the hind legs. When the spine and hind legs do not support as they should, BT Up is a valid aid that allows the animal to walk more easily, thus continuing to share with the owner daily gestures such as