Feeding signals : a practical guide to feeding dairy cows for health and production / Jan Hulsen, Dries Aerden, Jack Rodenburg ; editors Ton van Schie, Christel Lubbers ; translation [from the Dutch] Agrolingua ; English content editors Owen Atkinson, Jack Rodenburg ; photography Jan Hulsen, Anneke Hallebeek, Broer Hulsen, Bertjan Westerlaan ; illustrations Trudy Michels, Herman Roozen ; with the collaboration of Joep Driessen, Dick de Lange, Bert van Niejenhuis, Pieter Paschyn, Nico Vreeburg, Bertjan Westerlaan, Jaap van Zwieten