This study analyses the effect of environmental enrichment on the welfare, productive traits and meat quality of
lambs housed in feedlots. Sixty lambs were placed in enriched (EE) or conventional (CO) pens (3 pens for each
treatment, 10 lambs/pen) where EE had a wooden platform with ramps that provided access to a concentrate
hopper, cereal straw as bedding and forage, and one play ramp. The CO pen was barren, similar to commercial
feedlots. The physiological adaptation response of EE lambswasmore efficient than CO, since the latter mobilised
more body reserves (i.e., increased NEFA, P b 0.05), and had lower levels of immunity (i.e., increased N/L, P
b 0.05), which indicate chronic stress, probably associated with the barren environment. The EE lambs had a
higher (P b 0.05) average daily gain, with heavier carcasses and higher fattening scores, as well as lower pHult,
higher L* and b* values, and lower values of texture (P b 0.05).
This study analyses the effect of environmental enrichment on the welfare, productive traits and meat quality oflambs housed in feedlots. Sixty lambs were placed in enriched (EE) or conventional (CO) pens (3 pens for eachtreatment, 10 lambs/pen) where EE had a wooden platform with ramps that provided access to a concentratehopper, cereal straw as bedding and forage, and one play ramp. The CO pen was barren, similar to commercialfeedlots. The physiological adaptation response of EE lambswasmore efficient than CO, since the latter mobilisedmore body reserves (i.e., increased NEFA, P b 0.05), and had lower levels of immunity (i.e., increased N/L, Pb 0.05), which indicate chronic stress, probably associated with the barren environment. The EE lambs had ahigher (P b 0.05) average daily gain, with heavier carcasses and higher fattening scores, as well as lower pHult,higher L* and b* values, and lower values of texture (P b 0.05).
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