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Preference For Flavoured Foods By Lambs Conditioned With Intraruminal Administration Of Nitrogen, Juan J. Villalba, Frederick D. Provenza
Preference For Flavoured Foods By Lambs Conditioned With Intraruminal Administration Of Nitrogen, Juan J. Villalba, Frederick D. Provenza
Behavioral Education for Human, Animal, Vegetation, and Ecosystem Management (BEHAVE)
We suggested that food preference depends on the interplay between flavour and post-ingestive effects, and we predicted that protein-restricted lambs would acquire preferences for foods paired with supplemental sources of N, including urea (Expts 1 and 2), casein (Expt 3), and gluten (Expt 4). In each experiment, twenty lambs, in two groups of ten, were conditioned as follows: on odd-numbered days, lambs in group 1 received wheat straw (Expts 1, 3, and 4) or ground barley (Expt 2) flavoured with a distinctive flavour, and lambs in group 2 received the same food but with a different flavour. On even-numbered days, …
Preference For Wheat Straw By Lambs Conditioned With Intraruminal Infusions Of Starch, Juan J. Villalba, Frederick D. Provenza
Preference For Wheat Straw By Lambs Conditioned With Intraruminal Infusions Of Starch, Juan J. Villalba, Frederick D. Provenza
Behavioral Education for Human, Animal, Vegetation, and Ecosystem Management (BEHAVE)
We hypothesized that feed preference depends on the interplay between flavour and postingestive effects, and we tested two predictions based on this hypothesis: (1) lambs acquire preferences for poorly nutritious feeds paired with starch; and (2) preferences persist when starch is no longer administered. Twenty lambs were randomly allocated to two groups and conditioned as follows: on odd-numbered days, lambs in group 1 received onion-flavoured wheat straw and lambs in group 2 received oregano-flavoured wheat straw. On even-numbered days, the flavours were switched and starch (2.5-9.4% of the digestible energy received/d) was infused into the rumen of all animals during …