High-Fibre feeding in gestation
Published in 2015
Pregnant sows are generally fed in low quantities, a fact that may lead to poor satiety and may not fully satisfy their drive to express their foraging and feeding behaviours. Accordingly, feed restriction may lead to the frequent occurrence of oral activities other than feeding, including stereotypies, restlessness and aggressive behaviour in group-housed sows, which are interpreted as indicators of persistent drives and frustration associated with feeding. The inclusion of fibre in the diet reduces the latter's energy density and therefore allows meals to be larger without increasing the energy provided. In addition, dietary fibre influences the mechanisms that improve satiety and satiety at the sensory, post-digestive and post-absorption levels. This chapter examines the impact of dietary fibre on the behaviour and well-being of pregnant sows and describes its potential consequences for performance. The level of response to dietary fibre is, however, variable and depends on the characteristics of the fibre diet (inclusion rate, source of fibre, physicochemical properties), housing and feeding conditions and the characteristics of the sows, including parity, and is greater in young sows. Dietary fibre provided during gestation generally results in increased feed consumption by sows during lactation, probably due to its effects on the size and capacity of the gastrointestinal tract. Studies on the effects of fibre on reproductive performance are rare and show variable results, which could be partly attributable to an over- or underestimation of the diet's energy content during pregnancy. In conclusion, dietary fibre generally has a beneficial effect on the behaviour and welfare of pregnant sows on a restricted diet. The impact of high-fibre diets during pregnancy on reproductive performance over several successive cycles in group-housed sows merits further investigation.
Document Types: Scientific review
Animal categories: Porcines
Keywords: Enrichment, Cognitive processes, Stress