A motorized rehabilitation device includes a mobile base bound by a lower surface and an upper surface. A first motorized wheel assembly is supported on the upper surface of the mobile base. The mobile base also includes a second motorized wheel assembly at least partially extending below the lower surface of the base. A dome is bound by an exterior convex surface and an interior concave surface. The dome is biased for friction contact of the interior concave surface with the first motorized wheel assembly. An end-effector is positioned above the exterior concave surface. The end-effector is configured to engage an animal body part.