Abstract: A conveyor system including a first load supporting track and a second load supporting track with an intermediate transfer portion. A powered conveyor is provided in association with each of the first and second tracks. A plurality of carriers are provided. Each of the carriers has a first dog that is in position for normal engagement with the pusher member of the conveyor and longitudinally spaced second and third dogs that are normally urged to an operative carrier pushing position but are held by the track out of operative position. The second and third dogs include cam projections thereon that engage portions of the track which hold the second and third dogs out of operative position. The cam projection on the second dog extends oppositely to the cam projection on the third dog. At a transfer point, an appropriate portion of the track is cut away to permit either the second or third dogs to move to operative carrier transferring position.