Comparison of Hydrolyzed Intestinal By-products

Pigs were weaned at 16 to 20 days of age and fed diets containing either dried whey, dried porcine solubles (DPS), or condensed porcine solubles (CPS) for 3 weeks, followed by a common diet for 2 weeks. The results of the trial showed that 5% of either DPS or CPS can replace dried whey protein in diets for weanling with no effect on growth performance up to 5 weeks after weanin

Dried Porcine Solubles and Feed Additives

Pigs were weaned at 16 to 20 days of age and fed diets containing either dried whey or 6% dried porcine solubles (DPS), partially replacing dried whey protein, and one of two combinations of feed additives (either ZnO + CSP 250 or CuSO4 + Mecadox) in a 2 × 2 factorial arrangement. The diets were fed for 2 weeks and followed by a common diet for 3 weeks. Feeding the DPS-containing diet during week 1 and 2 post-weaning improved average daily gain in week 3 after weaning (when no DPS was fed), as well as cumulative average daily gain in weeks 0 to 3. However, it tended to lessen feed utilization in week 4 and 5. Furthermore, it was shown that the combination of ZnO and CSP 250 improved growth performance over CuSO4 and Mecadox in weanlingpig diets. Neither feed-additive combination influenced the utilization of DPS

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Effect of Spray-Dried Plasma and Dried Porcine Solubles on the Growth Performance of Weanling Pigs Raised in Different Health-Status Environments

Spray-dried plasma can advantageously replace whey on a protein basis in Phase I diets for early-weaned pigs, although less so in a ‘clean’ than in a ‘dirty’ environment. Contrary to previous trials, growth performance of weanling pigs was not affected when dried porcine solubles replaced whey protein

Effects of Feeding Conjugated Linoleic Acid to Nursery Pigs of Low- and High-Health Status on Growth and Immune Competence

Early weaned pigs allotted either into “clean” or into “dirty” environmental conditions and potentially subject to high or low levels of antigen exposure, respectively, were used to determine the impact of 0, .67, 1.33, and 2% conjugated linoleic acid (CLA-60) on the immune status and growth performance. CLA levels modulate immune status in weanling pigs by decreasing the CD4 + :CD8 + ratio due to an increase in CD8 + and a decrease in CD4 + %. If the result of that ratio is favorable to the numerator, it means that the animal has a greater immune potential to fight against bacterial-type infections (serum antibodies produced by plasma cells) than against viral or other intracellular-type infections. The increase in CD8 + indicates a potential increase in cytotoxic T lymphocytes. These cells play an important role in the development of the response of the animal against viral infections. CLA caused an increase in alpha-1-acylglycoprotein (AGP), a serum acute-phase protein produced in the liver in response to stimulation from specific cytokines. No statistical significance in feed efficiency was attributed to CLA. Pigs placed into the clean environment utilized feed more efficiently than those placed in the dirty environment. Growth performance was shown to be independent of dietary treatments, but after a period of 42 days, pigs fed CLA become more viral immune competent than control animals

Effect of Inorganic and Organic Trace Mineral Supplementation on the Performance, Carcass Characteristics, and Fecal Mineral Excretion of Phase-fed, Grow-finish Swine

Concentrated livestock production has led to soil nutrient accumulation concerns. To reduce the environmental impact, it is necessary to understand current recommended livestock feeding practices. Two experiments were conducted to compare the effects of trace mineral supplementation on performance, carcass composition, and fecal mineral excretion of phase-fed, grow-finish pigs. Crossbred pigs (Experiment 1 (Exp. 1), (n = 528); Experiment 2 (Exp. 2), (n = 560)) were housed in totally-slatted, confinement barns, blocked by weight, penned by sex, and randomly assigned to pens at approximately 18 kg BW. Treatments were allocated in a randomized complete block design (12 replicate pens per treatment) with 9 to 12 pigs per pen throughout the grow-finish period. In Exp. 1, the control diet (Io100) contained Cu as CuSO4, Fe as FeSO4, and Zn (of which 25% was ZnO and 75% was ZnO4) at concentrations of 63 and 378 mg/kg, respectively. Treatment 2 (O100) contained supplemental Cu, Fe, and Zn from organic sources (Bioplex, Alltech Inc., Nicholasville, KY) at concentrations of 19, 131, and 91 mg/kg, respectively, which are the commercially recommended dietary inclusion levels for these organic trace minerals. Organic Cu, Fe, and Zn concentrations from O100 were reduced by 25% and 50% to form treatments 3 (O75) and 4 (O50-1), respectively. In Exp. 2, treatment 5 (Io25) contained 25% of the Cu, Fe, and Zn (inorganic sources) concentrations found in Io100. Treatment 6 (O50-2) was identical to the O50-1 diet from Exp. 1. Treatment 7 (O25) contained the experimental microminerals reduced by 75% from concentrations found in O100. Treatment 8 (O0) contained no trace mineral supplementation and served as a negative control for Exp. 2. In Exp. 1, tenth-rib backfat, loin muscle area and ADG did not differ (p\u3e0.05) between treatments. Pigs fed the control diet (Io100) consumed less feed (p\u3c0.01) compared to pigs fed diets containing organic trace minerals, thus, G:F was greater (p = 0.03). In Exp. 2, there were no differences among treatment means for loin muscle area, but pigs fed the reduced organic trace mineral diets consumed less (p\u3c0.05) feed and tended (p = 0.10) to have less tenth-rib backfat compared to pigs fed the reduced inorganic trace mineral diet. Considering that performance and feed intake of pigs was not affected by lower dietary trace mineral inclusion, mineral excretion could be reduced during the grow-finish phase by reducing dietary trace mineral concentration