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Allaitement artificiel ovin et enrichissement social : un bénéfice potentiel de la présence de brebis adultes sur la santé et le bien-être du jeune

Abstract : The lack of mother is likely to be a source of disturbance for artificially fed lambs. This study investigated the effects of the presence of adult ewes in order to overcome partially maternal deprivation, on the behaviour and welfare of such lambs from birth to 5 months of age. Three groups were investigated: mothered lambs (AM), lambs reared in a standard artificial feeding system (AAS), and artificially fed lambs reared in the presence of non-lactating adult ewes (AAB). At the behavioural level, a preference for the mother is seen at 1 month of age in AM, whereas it is expressed at 2 months for the adult sheep in the AAB group. The health status at 21 days is better in AM and AAB than in AAS lambs, the anal region being less soiled by faeces. In the early milk feeding period, growth rate is lower in AAB and AAS than in AM lambs, but the curves are reversed between 30 and 60 days. At 5 months, mothered lambs were the least heavy. Microbiological analyses of faeces show that at 7 and 30 days, half the lambs are infected with Clostridium perfringens, the AM group being the most affected (81%). After weaning, no AM lambs remain infected while the two other groups are. No significant difference appears in the intensity of the infection between AAB and AAS lambs. Most lambs respond to vaccination against chlamydiosis, without significant differences between treatments. Finally, two lambs died in each artificially fed group. The presence of adult ewes reduces some of the negative effects of artificial feeding, and this could offer interesting ways to improve the welfare of lambs.
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https://hal.inrae.fr/hal-02738240
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Submitted on : Tuesday, June 2, 2020 - 8:37:18 PM
Last modification on : Tuesday, May 18, 2021 - 12:06:03 PM

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  • HAL Id : hal-02738240, version 1
  • PRODINRA : 458122

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Raymond Nowak, Narjis Kraïmi, Elodie Chaillou, Fabien Cornilleau, Marine Devaux, et al.. Allaitement artificiel ovin et enrichissement social : un bénéfice potentiel de la présence de brebis adultes sur la santé et le bien-être du jeune. 24. Rencontres autour des Recherches sur les Ruminants (3R), Dec 2018, Paris, France. ⟨hal-02738240⟩

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