Developing and testing a new feed block for the gut health and welfare of the weaning pig

Abstract

Pig weaning cause transient stress and reduction of feed intake and intestinal villi. Providing feed with solid texture could stimulate explorative interest, relieving weaning drawbacks and improving welfare. Feed blocks (0.8 kg each) were produced and 8 formulas were preliminarily tested for consumption on a pig farm (ingredients: wheat by-products, dried milk whey, calcium carbonate, oil, molasses). Feed consumption and growth within 3 days after weaning were assessed on penned litters fed the normal feed ad libitum, and one of the 3 best block formulas or a control (wooden pieces). Block consumption was relevant, but growth and carcase quality on a sub-sample reared to commercial maturation were not changed. These formulations were also tested against control on 72 weaned pigs on which behaviour related to feeding and social activities was evaluated by means of surveys using cameras. After 4 days, pigs were slaughtered and the small intestines were sampled for mucosa morphology. In general, block consumption was additive with the consumption of normal feed. Growth was not affected. One formulation (major ingredients: wheat middlings, cane molasses, milk whey and coconut oil) increased the mucosal surface area of the intestinal villi by 7.9% (p < .05) and the length of time the pigs slept (p < .01), of the activities detected by cameras. The presence of some ingredient in the formula may have influenced feed block consumption with a potential reduction in the negative impact of weaning on the growth of the intestinal villi and an improvement of some behavioural parameters. HIGHLIGHTS Ingredient composition may influence the disappearance of the feed block, as a variable combination of disaggregation and intake by the piglets. The formulation based on wheat middlings, cane molasses, milk whey and coconut oil may improve growth and favour better welfare Block supplementation may increase the absorbent surface of the proximal jejunum.

Economic Feeding of Pigs in Mizoram: A Field Study for Assessment of Nutritional Constraints and Identifying the Useful Local Feed Resources for Economic Feeding

“…Patoo et al (2014) found concentrate jaggery scum feed blocks acceptable for pigs. Trevisi et al (2019) developed three formula (using wheat by-products, dried milk whey, calcium carbonate, oil, molasses) of feed block preparation for pigs and observed not significant difference in growth and carcass quality than normal feeding. They observed that formulation with wheat middlings, cane molasses, milk whey and coconut oil increased the mucosal surface area of the intestinal villi by 7.9% (p<0.05) and the length of time the pigs slept (p<0.01).…”