1. Department of Animal SciencesAdaptation Physiology GroupWageningen UniversityWageningenThe Netherlands
2. Department of Animal SciencesAnimal Nutrition GroupWageningen UniversityWageningenThe Netherlands
3. Unité de Recherche 1341, Alimentation et Adaptations Digestives, Nerveuses et ComportementalesInstitut National de la Recherche AgronomiqueSaint GillesFrance