Book reviewed in this article:Reproductive Biology of the Mare: Basic and Applied Aspectsby O. J. Ginthen. Published by McNaughton&Gunn Inc Ann arbor, Michigan, USA (1979).Osteochondrosis in Domestic Animals. Volume1. Edited by Sten‐Erik Olsson.Annual Report of the Animal Health Trust1979.Abnormalities of Companion Animalsby C. W. Foley, J. F. Lasley and G. D. Osweiler. Published by Bailliere Tindall, London (1980).The World Atlas of Horses and Ponies.Edited by Peter Churchill.The Horse.Edited by Michael Seth Smit