Acknowledgements 6 Preface 7 Chapter 1 Introduction 8 Chapter 2 Genital soundness in the ram and diseases of the genitalia 16 Chapter 3 Factors affecting lamb production and the investigation of poor lambing 40 Chapter 4 Abortion in ewes 62 Chapter 5 Lamb survival and lamb mortality 76 Chapter 6 Hogget growth, pneumonia and diseases of hoggets 92 Chapter 7 Clinical aspects of trace-element requirements of grazing ruminants with particular reference to sheep and cattle 112 Chapter 8 Internal parasites 156 Chapter 9 Metabolic disorders 188 Chapter 10 Poor thrift in adult ewes 206 Chapter 11 Foot diseases and lameness 234 Chapter 12 Eye diseases 252 Chapter 13 Caseous lymphadenitis 258 Chapter 14 Diseases of the mammary gland 264 Chapter 15 Clostridial diseases 270 Chapter 16 Other causes of sudden death including salmonellosis, Histophilus somni, septicaemia, redgut, enteric listeriosis and anthrax 282 Chapter 17 Neurological disorders 292 Chapter 18 Disorders of the skin and wool 308 Chapter 19 External parasites 330 Chapter 20 Miscellaneous diseases of sheep 342 Chapter 21 Exotic diseases 356 Index 395 About the authors 407.