By TickTock Books
By Headstrom, Richard
By Jay, Michael
By Myers, A.A., Giller, P.
By Esther Verhoef-Verhallen
By Sarah Gibson
By Alan Clamp
By Davey
By National Research Council, Division on Earth and Life Studies, Board on Agriculture and Natural Resources, Committee on Animal Nutrition, Subcommittee on Dog and Cat Nutrition
By Alexander R. Margulis (Cornell University, New York, NY, U.S.A.)
By Alfred S. Posamentier, Ingmar Lehmann
By Ganeri, Anita, Anita; Martell, Hazel Mary; Williams, Brian
By Barbara Taylor
By Ronald M. Atlas (University of Louisville, Kentucky, USA)
By Roderick A. Cawson, J. W. Eveson, W.H. Binnie, William H Binnie
By Whitaker, Robert H., Borley, Neil R.
By Alastair Munro
By Richard Bird, National Trust Books
By Sapolsky, Robert M
By C. Lentner
By Jacqueline Dineen
By Rob Hume, Illustrated with numerous colour plates
By Jinny Johnson, Mike Woods, Bruce Pearson
By Jane B. Morgan (University of Surrey, Guildford, UK), John W. T. Dickerson (University of Surrey
By Stephen Baker, Jackie Geyer
By Gerardo Ceballos (Instituto de Ecologia, UNAM, UNAM)
By DK