AUTHOR=Nielsen Birte L. , Jezierski Tadeusz , Bolhuis J. Elizabeth , Amo Luisa , Rosell Frank , Oostindjer Marije , Christensen Janne W. , McKeegan Dorothy , Wells Deborah L. , Hepper Peter TITLE=Olfaction: An Overlooked Sensory Modality in Applied Ethology and Animal Welfare JOURNAL=Frontiers in Veterinary Science VOLUME=2 YEAR=2015 URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2015.00069 DOI=10.3389/fvets.2015.00069 ISSN=2297-1769