Abstract: The modular ball track cat toy (10) includes a ball (15) disposed in a track that is expandable, i.e., modular. The modular track includes sections of track that may have different sizes and shapes. The track sections (20, 25) may be coupled by a universal connector (17). The various track sizes and shapes allow a user to set up the track in various configurations for continuously new cat play activities. Each track section (20, 25) is a tube having a top opening dimensioned so that the ball (15) can freely roll inside the tube but cannot escape the tube through the top opening. The universal connector (17) and tube sections (20, 25) have interlocking members (19, 52, 18, 50) that constrain rotational and axial movement of the tube sections (20, 25), thereby preventing the pet from dismantling or twisting the toy (10) during play.

Abstract: The pet carrier includes a pair of lateral straps attached or attachable to lateral ends of the pet transport device to form loops adapted for extending the vehicle seat belt therethrough to secure the frame of the device to the vehicle seat. The strapping system also has a third strap having one end forming a loop on the exterior of the pet carrier or transport device, and an opposite end extending into the interior of the carrier, pet seat, or other transport device and terminating in a snap hook or the like for attachment to a pet collar. The vehicle seat belt also extends through the third strap's loop so that both the carrier and a pet tether are restrained by the vehicle's seatbelt.