Olfaction: An Overlooked Sensory Modality in Applied Ethology and Animal Welfare - Nielsen, Birte L.; Jezierski, Tadeusz; Bolhuis, J. Elizabeth; Amo, Luisa; Rosell, Frank; Oostindjer, Marije; Christensen, Janne W.; McKeegan, Dorothy; Wells, Deborah L.; Hepper, Peter (Frontiers in Veterinary Science, 2015)