Cattle restraining squeeze chute with angled rubber louvres on the side which prevent the cattle from seeing people. The side can be opened for easy access for injections and other veterinary procedures. The louvres block the animal's vision the same way that louvred shutters block vision through windows in a house.
A good example of a non-slick surface for livestock.
Grandin, T. 1995Restraint of Livestock
Proceedings of Animal Behaviour, Design of Livestock and Poultry Systems International Conference.(pages 208-223)
Published by: Northeast Regional Agriculture Engineering Service,
Cooperative Extension
152 Riley - Robb Hall
Ithaca, New York, 14853
USA
Grandin, T. (Editor) 1993
Livestock Handling and Transport
CAB International, Wallingford Oxon, United Kingdom
Grandin, T. 1991
Double Rail Restrainer For Handling Beef Cattle
Paper No. 915004 American Society of Agricultural Engineers
2950 Niles Road
St.Joseph , Michigan , 49085
USA
Grandin, T. 1988
Double Rail Restrainer For Livestock Handling
Journal of Agricultural Engineering Research 41:327-338