Genetically selecting sows to increase their reproductive output provides larger litter size and increased profitability for the farmers. However, it is well established that larger litters at birth can impair piglet viability, leading to increased pre-weaning mortality (Quiniou et al., 2002, Wolf et al., 2008). In addition, the need for a group housing system for gestating sows has led to many questions concerning management and feeding strategies to maintain optimal reproductive performance and production of viable piglets (Johnston & Li, 2013). Based on this, some strategies applicable to sows during late gestation, before parturition, and after birth have been implemented to increase piglet survival rate (Peltoniemi et al., 2021).
Dietary elevations of tryptophan (200-400% more than the requirement), a precursor of serotonin that reduces anxiety through its sedative effect, has been investigated as a supplement to potentially decrease aggression in sows at mixing (Li et al., 2011; Polleto et al., 2014). Richert et al. (2017) did not observe changes in sow behavior during farrowing after feeding high levels of tryptophan. However, they observed a reduction in stillbirths and increased feed intake after farrowing. Other strategies to reduce aggression during group housing are to mix first parity sows with gilts instead of other sows (Li et al., 2012), increase feed intake before and a couple of days after mixing (DeRouchey and Tokach, 2013), or install a non-competitive feeding system — although this may be more expensive and take up a lot of space (Johnston & Li, 2013). In terms of preventing farrowing problems, increasing the frequency of meals (more than thrice daily) can be advantageous to maintain glucose blood level stability throughout the day to provide adequate energy for the farrowing processes of sows with large litters (de Leeuw et al., 2004; Feyera et al., 2018).
Diets with increased levels of fiber are being provided for gestating sows to increase colostrum production (Theil et al., 2014), improve the farrowing process (Oliviero et al., 2009; Feyera et al., 2017), increase litter size (Reese et al., 2008), reduce stereotypic self-directed behaviors (Bergeron et al., 2000, de Leeuw et al., 2008), prolong satiety (de Leeuw et al, 2008), and decrease sow activity (Bolhuis et al., 2008, de Leeuw et al., 2008) and aggression among penmates (Bolhuis et al., 2010; Richert et al. 2017). Although all of these benefits contribute toward a reduction in piglet mortality, feeding more fiber can also increase the risk for mycotoxin contamination. Therefore, it is essential to assess the mycotoxin status of fibrous products used in pig diets (Brooks, 2008).
Other variables that can influence sow behavior and cannot be ignored are stress and lameness, which can compromise the resiliency and productivity of sows. Problems concerning lameness, claw lesions, and skin lesions are closely related to floor characteristics and group housing (Calderón Díaz et al., 2013). Some studies have reported that rubber flooring increases the welfare of group-housed sows (Elmore et al., 2010; Calderón Díaz et al., 2013; Calderón Díaz & Boyle, 2014). Bos et al. (2022) observed that the incidence of lameness peaks during the first half of the gestation period, being considerably less pronounced for sows housed in pens with rubber flooring instead of concrete. They also observed a decreased chance of sows becoming lame, a better than average score of locomotion, and less severe claw lesions when sows were housed on rubber flooring. On the other hand, zinc supplementation (0, 50, or 100 mg/kg of 50% organic and 50% inorganic zinc) did not have any effect on claw health or sow locomotion. These authors reported that, since the rate of hoof growth has been reported to be heritable (Quintanilla et al., 2006), sows should also be selected according to characteristics of claw health.
Due to recent changes, European Welfare legislation now requires that gestating sows need to be group housed after insemination until a few days before parturition and fed with a diet that satiates their hunger. As a result, nutritional and management strategies are indispensable to satisfy animals’ behavior and welfare needs to keep improving sow resiliency and productivity. Regarding this, high fiber diets, nutritional supplements like tryptophan, rubber flooring, and mixing gilts with first parity sows are some alternatives that can reduce sow stress, lameness, and, ultimately, piglet mortality.
Bergeron, R.; Bolduc, J.; Ramonet, Y.; Meunier-Salaun, M. C.; Robert, S. Feeding motivation and stereotypies in pregnant sows fed increasing levels of fibre and/or food. Appl. Anim. Behav. Sci. 2000, 70:27-40.
Bolhuis, J. E.; Van Den Brand, H.; Staals, S. T. M.; Zandstra, T.; Alferink, S. J. J.; Heetkamp, M. J. W.; Gerrits, W. J. J. Effects of fermentable starch and straw-enriched housing on energy partitioning of growing pigs. Animal. 2008, 2:7, 1028-1036.
Bolhuis, J. E.; Van Den Brand, H.; Bartels, A. C.; Oostindjer, M.; van den Borne, J.J.G.C.; Kemp, B.; Gerrits, W.J.J. Effects of fermentable starch on behavior of growing pigs in barren or enriched housing. Appl. Anim. Behav. Sci. 2010, 123(3-4):77-86.
Bos, E. J.; van Riet, M. M.; Maes, D.; Millet, S.; Ampe, B.; Janssens, G. P.; Tuyttens, F. A. Effect of rubber flooring on group-housed sows' gait and claw and skin lesions. J Anim Sci. 2016, 94(5):2086-96.
Brooks, P. H.; Fibre for gestating sows. 2008 Manitoba Swine Seminar. 2008. http://www.plymouth.ac.uk/pages/dynamic.asp?page=staffdetails&id=phbrooks
Calderón Díaz, J. C.; Fahey, A. G.; KilBride, A. L.; Green, L. E.; Boyle, L. A. Longitudinal study of the effect of rubber slat mats on locomotory ability, body, limb and claw lesions, and dirtiness of group housed sows. J. Anim. Sci. 2013, 91:3940–3954.
Calderón Díaz, J. C.; Boyle, L. A. Effect of housing on rubber slat mats during pregnancy on the behaviour and welfare of sows in farrowing crates. Ir. J. Agric. Food Res. 2014, 53:189–197.
De Leeuw, J. A.; Jongbloed, A. W.; Verstegen, M. W. A. Dietary fiber stabilizes blood glucose and insulin levels and reduces physical activity in sows (Sus scrofa). J. Nutr. 2004, 134:1481-1486.
De Leeuw, J. A.; Bolhuis, J. E.; Bosch, G.; Gerrits, J. J. Effects of dietary fibre on behavior and satiety in pigs. Proc. Nutr. Soc. 2008, 67:334-342.
DeRouchey, J.; Tokach, M. Group-housing systems: nutritional considerations. Pork Check Off, 2013, 03647-3.
Elmore, M. R.; Garner, J. P.; Johnson, A. K.; Richert, B. T.; Pajor. E. A. A flooring comparison: The impact of rubber mats on the health, behavior, and welfare of grouphoused sows at breeding. Appl. Anim. Behav. Sci. 2010, 123:7–15.
Feyera, T.; Højgaard, C. K.; Vinther, J.; Bruun, T. S.; Theil, P. K. Dietary supplement rich in fiber fed to late gestating sows during transition reduces rate of stillborn piglets. J Anim Sci. 2017, 95:5430–8.
Feyera, T.; Pedersen, T. F.; Krogh, U.; Foldager, L.; Theil, P. K. Impact of sow energy status during farrowing on farrowing kinetics, frequency of stillborn piglets, and farrowing assistance. J Anim Sci. 2018; 96:2320–31.
Johnston, Lee J.; and Yuzhi Li. Management and Feeding of Group-Housed Gestating Sows. Midwest Swine Nutrition Conference Proceedings, Indianapolis, Indiana, USA, September 5, 2013, pp. 20-26. Organizing Committee, Midwest Swine Nutrition Conference.
Li, Y. Z.; Baidoo, S. K.; Johnston, L. J.; Anderson, J. E. 2011. Effects of tryptophan supplementation on aggression among group-housed gestating sows. J. Anim. Sci. 2011, 89:1899-1907.
Li, Y. Z.; Wang, L. H.; Johnston, L. J. Sorting by parity to reduce aggression toward first-parity sows in group-gestation housing systems. J. Anim. Sci. 2012, 90:4514-4522.
Oliviero, C.; Kokkonen, T.; Heinonen, M.; Sankari, S.; Peltoniemi, O. Feeding sows with high fibre diet around farrowing and early lactation: impact on intestinal activity, energy balance related parameters and litter performance. Res Vet Sci. 2009, 86:314–9.
Peltoniemi, O.; Yun, J.; Björkman, S.; Han, T. Coping with large litters: the management of neonatal piglets and sow reproduction. J Anim Sci Technol. 2021, 63(1):1-15.
Poletto, R.; Kretzer, F.; Hotzel, M. Minimizing aggression during mixing of gestating sows with supplementation of a tryptophan-rich diet. Physiol. Behav. 2014, 132:36-43.
Quiniou, N.; Dagorn, J.; Gaudré, D. Variation of piglets’ birth weight and consequences on subsequent performance. Livest. Prod. Sci. 2002, 78:63–70.
Quintanilla, R.; Varona, L.; Noguera, J. L. Testing genetic determinism in rate of hoof growth in pigs using Bayes factors. Livest. Sci. 2006, 105:50–56.
Richert, B.; Marchant-Forde, J.; Jr, D. L. Effect of nutrition on sow behavior. In 17th Annual Midwest Swine Nutrition Conference Proceedings, Indianapolis, Indiana, USA, September 7, 2017, pp. 17-22. Organizing Committee, Midwest Swine Nutrition Conference.
Reese, D.; Prosch, A.; Travnicek, D. A.; Eskridge, K. M. Dietary Fiber in Sow Gestation Diets - An Updated Review. Nebraska Swine Reports. 2008, 45:14-18.
Theil, P. K.; Lauridsen, C.; Quesnel, H. Neonatal piglet survival: impact of sow nutrition around parturition on fetal glycogen deposition and production and composition of colostrum and transient milk. Animal. 2014, 8:1021–30.
Wolf, J.; Žáková, E.; Groeneveld, E. Within-litter variation of birth weight in hyperprolific Czech Large White sows and its relationto litter size traits, stillborn piglets and losses until weaning. Livest. Sci. 2008,115:195–205.
17 October 2022
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