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    Identifying challenges to manage body weight variation in pig farms implementing all-in-all-out management practices and their possible implications for animal health: a case study

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    Author
    Rodrigues da Costa, Maria
    García Manzanilla, Edgar
    Diana, Alessia
    van Staaveren, Nienke
    Torres-Pitarch, Alberto
    Boyle, Laura A
    Calderón Díaz, Julia A
    Keyword
    Animal movements
    Delayed pigs
    Early weaning
    Pig sorting
    Production flow
    Swine
    Date
    2021-01-11
    
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    URI
    https://doi.org/10.1186/s40813-021-00190-6; http://hdl.handle.net/11019/2734
    Citation
    Rodrigues da Costa, M., García Manzanilla, E., Diana, A. et al. Identifying challenges to manage body weight variation in pig farms implementing all-in-all-out management practices and their possible implications for animal health: a case study. Porc Health Manag 7, 10 (2021). https://doi.org/10.1186/s40813-021-00190-6
    Abstract
    Background Managing body weight (BW) variation is a challenge in farrow-to-finish farms implementing all-in/all-out (AIAO) production systems due to the lack of “off-site” facilities to segregate slow growing pigs (SGP). This case study investigated different approaches to managing BW variation in a farrow-to-finish commercial pig farm with a self-declared AIAO management and the possible implications for animal health. Case presentation A total of 1096 pigs (1047 pigs born within 1 week plus 49 pigs born 1 week later) were tracked until slaughter as they moved through the production stages. Piglets were individually tagged at birth and their location on the farm was recorded on a weekly basis. In total, 10.3% of pigs died during lactation. Four main cohorts of pigs were created at weaning and retrospectively identified: cohort 1 = pigs weaned at 21 days (4.5%); cohort 2 = pigs weaned at 28 days (81.0%), which was sub-divided at the end of the first nursery stage into sub-cohort 2a = pigs split at 3 weeks post-weaning (29.7%); sub-cohort 2b = pigs split at 3 weeks post-weaning from cohort 2a and split again 5 weeks post-weaning (35.5%) and sub-cohort 2c = remaining smaller size pigs from cohort 2b (10.9%); cohort 3 = pigs weaned at 35 days (2.7%) and cohort 4 = pigs weaned at 49 days (1.5%) that were later mixed with SPG, delayed pigs from other cohorts and sick/injured pigs that recovered. Four strategies to manage BW variation were identified: i) earlier weaning (cohort 1); ii) delayed weaning of SGP (cohort 3 and 4); iii) re-grading pens by BW (sub-cohorts 2a, 2b and 2c) and, iv) delayed movement of SGP to the next production stage (several pigs from all cohorts). A higher percentage of delayed pigs presented pericarditis, pleurisy and enzootic pneumonia like lesions at slaughter compared with pigs under other strategies. Conclusion A variety of management practices were implemented to minimise BW variation during the production cycle. However, several cohorts of pigs were created disrupting AIAO management. Earlier weaning should only be practiced under specific circumstances where optimal animal health and welfare are guaranteed. Delayed weaning of SGP and delaying pigs to move to the next production stage could negatively affect animal health and should be avoided.
    Funder
    Department of Agriculture, Food and the Marine; Teagasc Walsh Fellowship Programme
    Grant Number
    14/S/832; PDPG-6666; PDPG-6497; PDPG-6671.; 11/S/107
    ae974a485f413a2113503eed53cd6c53
    https://doi.org/10.1186/s40813-021-00190-6
    Scopus Count
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    Pig Development
    Pig Development
    Teagasc publications in Biomed Central

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