PAIN+II - Latency to lie highly negatively correlated With...

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Pain due to dehorning (Mellor et al., 2000) 0 20 40 60 80 100 120 0 0.5 2 4 6 8 10 Cortisol Concentration Time after Procedure Dehorned Local Control
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Pain response to castration (Mellor et al., 2000) 0 50 100 150 200 250 30 2 4 6 8 Cortisol concentration Time after procedure Surgery Ring Control
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GAIT SCORE 4 Severe impairment, but can still walk Bird remains squatting when approached or touched Can walk when picked up by observer, but squats after a few steps
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BUT Does walking badly mean that you are in pain?
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Latency to Lie (LTL) test (Weeks et al., After settling-in period, pen flooded with tepid water to depth of 30mm; time to lie down recorded
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Unformatted text preview: Latency to lie highly negatively correlated With GS Ruptured Tendon • Results from excessive weight on tendons • Birds are lame or walk on their hocks • Probably most painful at time of separation Argument from analogy Lameness and Pain • Lame broilers (GS > 1) preferentially select feed containing an analgesic; more as GS increases ( Danbury et al ’00, Vet. Rec. 146:307-311) • Lame broilers (GS 3) treated with an analgesic traverse obstacles to reach feed more quickly (McGeown et al ’99, Vet. -Rec. 144: 688-671)...
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