An investigation into the effect of dietary particle size and pelleting of diets for finishing pigs

Ball, M. E. E.; Magowan, Elizabeth; McCracken, K. J.; Beattie, V.E.; Bradford, R.; Thompson, A. N.; Gordon, F. J.

doi:10.1016/j.livsci.2014.11.015

Cited by 24 publications

(13 citation statements)

References 24 publications

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“…In a series of 3 experiments, the authors reported that pigs fed diets in pelleted form averaged an 8% improvement in G:F compared with pigs fed diets that were pelleted, reground, and then fed in meal form. Data from Ball et al (2015) further supports the hypothesis that the greatest improvement in feed efficiency from pelleting is from reduced wastage. These researchers found improvements in energy digestibility in pigs fed pelleted diets, but the effect was small and accounted for only a small portion of the G:F improvement.…”

Section: Discussionmentioning

confidence: 54%

Effects of diet form and feeder adjustment on growth performance of nursery and finishing pigs1

Nemechek

Tokach

Dritz

et al. 2015

Journal of Animal Science

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ABSTRACT:Three experiments were conducted to determine the effects of feeder adjustment and diet form on growth performance of nursery (Exp. 1 and 2) and finishing (Exp. 3) pigs. Treatments were arranged as a 2 × 3 factorial with the main effects of feeder adjustment and diet form. The 2 feeder adjustments were a narrow and wide feeder adjustment (minimum gap opening of 1.27 and 2.54 cm, respectively). The 3 diet forms were meal, poor-quality pellets (70% pellets and 30% fines for Exp. 1 and 2 and 50% pellets and 50% fines for Exp. 3), and screened pellets with minimal fines (3 to 10%). In Exp.

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Section: Discussionmentioning

confidence: 54%

Effects of diet form and feeder adjustment on growth performance of nursery and finishing pigs1

Nemechek

Tokach

Dritz

et al. 2015

Journal of Animal Science

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“…As a result, chicken require high quality feed which will provide readily available nutrients to the enzymes [1]. Besides feed composition as the most important factor that determines the efficiency of feed utilization by animals, feed structure (particle size) and feed form (mash, pellets) are also important for the optimal nutrient utilization [2][3][4][5]. The success or failure of any poultry industry depends to a large extent on feeding.…”

Section: Introductionmentioning

confidence: 99%

Influence of Feed Form and Particle Size on Gizzard, Intestinal Morphology and Microbiota Composition of Broiler Chicken

Aguzey¹,

Gao²,

Wu³

et al. 2018

Poult Fish Wildl Sci

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Feed structure (particle size) and form (mash, pellets) play very important roles in ensuring the optimal utilization of nutrients by determining the level of feed intake. Modern meat type birds have high appetite for food therefore their FI should be well studied to ensure the realization of their full genetic potential. Pellets consist of ground feed that has been compressed and molded in a pellet mill. Pelleting binds the individual ingredients together to make a whole feed and prevents selective feeding therefore ensuring that all the animals are given well balanced diets. Mash is the nutritionally complete poultry diet in a ground form. The quality of the mash is assessed by the size and uniformity of its particles. Feeding broilers on mash diets have positive effect on gizzard development than feeding pelleted diets by increasing the relative weight. There is proper stimulation by the feed ensuring the optimum function of the gizzard when mash diets are fed. Birds fed pelleted diets have lower length and weight of the duodenum, jejunum, ileum and caeca than those fed mash diets but the villus height and crypt depth of birds fed pelleted diets are higher compared with those fed mash diet. The microbiota composition promotes healthy immune system and growth.

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“…The issue of feeding and gastric ulceration in pigs is an interesting example where there may be trade-offs between different desirable and undesirable aspects of production. Pelleting and fine grinding of feed (the principal risk factors for ulceration) have various apparent positive effects: increased performance (Eisemann and Argenzio, 1999a;Mikkelsen et al 2004;Millet et al 2012b;Ball et al 2015;Nemechek et al 2015;Overholt et al 2016); reduced nitrogen excretion (Wondra et al 1995;Ball et al 2015); reduced greenhouse gas emissions (Dammgen et al 2016); reduced feed wastage (Ball et al 2015). These effects are linked to increased efficiency and increased sustainability (smaller negative effects on the environment and the climate per kg pork produced).…”

Section: Discussionmentioning

confidence: 99%

A study of associations between gastric ulcers and the behaviour of finisher pigs

Rutherford

Thompson

Thomson³

et al. 2018

Livestock Science

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Gastric ulcers are a common condition in finisher pigs. A study was conducted to investigate the hypothesis that gastric ulceration alters the behaviour of finisher pigs. Two one-hour observations (from video recordings) of home pen behaviour were conducted in finisher pigs, at two farms (one in Denmark and one in Scotland), in the days immediately prior to slaughter. Stomach condition was assessed post mortem according to a pre-established ulcer score index. The behaviour of pigs with healthy stomachs (n=36) was compared with the behaviour of pigs with deep ulceration of the pars oesophagea (n=26). Assessment of various predefined postures and behaviours was made by an observer blind to the gastric ulcer status of the observed pigs. Behavioural data from the two sites were combined in a single analysis. Pigs with gastric ulcers tended to spend less time idle (P=0.081) and less time lying on their left side (P=0.064), and significantly more time standing (P=0.009), or walking (P=0.038) compared to healthy pigs. Pigs with ulcers also showed an increased frequency of posture changes (P=0.02). A decrease in time spent lying on the left and an increase in standing/walking could both be interpreted as attempts to avoid liquid gastric contents pooling in the cranial region of the stomach. This along with the higher level of posture changes observed may indicate some degree of pain/discomfort associated with the presence of gastric ulcers in pigs. This study is the first to identify apparent behavioural differences between finisher pigs with or without gastric ulcers, and further work is needed to establish to what extent the apparent behavioural differences are a consequence of pain or discomfort for the animals concerned. Since gastrooesophageal ulceration of pigs is associated with pelleting and fine grinding of feed which in turn is linked to increased growth efficiency there may be a dilemma between on one hand concern for preventing gastric ulcers and on the other hand concern for the efficiency and sustainability of pig production.

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An investigation into the effect of dietary particle size and pelleting of diets for finishing pigs

Cited by 24 publications

References 24 publications

Effects of diet form and feeder adjustment on growth performance of nursery and finishing pigs1

Effects of diet form and feeder adjustment on growth performance of nursery and finishing pigs1

Influence of Feed Form and Particle Size on Gizzard, Intestinal Morphology and Microbiota Composition of Broiler Chicken

A study of associations between gastric ulcers and the behaviour of finisher pigs

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