 A major piece of equipment that Grandin developed was a center track (double rail) conveyor restrainer systemfor holding cattle during stunning at large beef slaughtering plants. The first system was installed in the mid-1980s for calves and a system for large beef cattle was developed in 1990. This equipment is now being used by many large meat companies. It is described in "Double Rail Restrainer Conveyor for Livestock Handling", first published in the Journal of Agricultural Engineering Research, Vol. 4, pp. 327–338 in 1988, and "Transferring results of behavioral research to industry to improve animal welfare on the farm, ranch, and slaughter plant", Applied Animal Behavior Science, Vol. 8, pp. 215–228, published in 2003.
<meaning-changed>  A major piece of equipment that Grandin developed was a center track (double rail) conveyor restrainer systemfor holding cattle during stunning at large beef slaughtering plants. The first system was installed in the mid-1980s for calves and a system for large beef cattle was developed in 1990. This equipment is now being used by many large meat companies. It is described in "Double Rail Restrainer Conveyor for Livestock Handling", first published in the Journal of Agricultural Engineering Research, Vol. 4, pp. 327–338 in 1988, and "Transferring results of behavioral research to industry to improve animal welfare on the farm, ranch, and slaughter plant", Applied Animal Behavior Science, Vol. 8, pp. 215–228, published in 2003.