A double rail restrainer conveyor has been operating for two years in a commercial calf slaughter plant. It is operating at a production rate of 300 small calves or 150 large veal calves/h. The calves straddle a moving double rail which supports them under the brisket and belly. The moving rail is formed from metal segments which are attacked to an endless chain. Adjustable sides on each side of the conveyor can be rapidly positioned to accomodate different sized animals while the slaughter line is running. This system has many advantages compared to existing V restrainer conveyor systems. Some of the advantages are: less expensive to construct, animals enter the restrainer more easily, easier captive bolt stunning, and its is adjustable for a wide variety of animal sizes. It can handle calves weighing 23–226 kg and all sizes of sheep. Systems are under development for adult cattle and automatic stunning of pigs. A double rail for handling cattle for veterinary procedures is also being developed.