scholarly journals 158 Growth performance of weaned pigs fed multi-enzyme supplemented corn-soybean meal-based diets – two semi-commercial studies

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 92-93
Author(s):  
Wenting Li ◽  
Jie Feng
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Body Weight Gain ◽  
Control Diet ◽  
Phase 1 ◽  
Health Condition ◽  
Enzyme Treatment ◽  
Weaned Pigs ◽  
Nursery Pigs ◽  
Set Up

Abstract Two studies were conducted with same set-up at a commercial facility to determine the effects of supplementing corn-SBM-based diets with or without a multi-enzyme on performance of nursery pigs. A total of 240 piglets (per trial) weaned at 25 d of age were randomly assigned to the 12 pens (10 barrows and 10 gilts per pen) pre-assigned with one of the experimental diets: a drug-free control diet containing 3000 ppm Zn and 1000 FTU phytase/kg with or without a multi-enzyme (4,000 U of xylanase, 150 U of amylase, 150 U of β-glucanase and 3000 U of protease/kg feed, n = 6). The diets were fed for 6 wks in 2 growth phases (phase 1: 0–2 weeks; phase 2: 3–6 weeks). Feed intake (ADFI), body weight (BW), body weight gain (ADG) were recorded by phase. Data were analysed by MIXED procedure of SAS (9.4) and significance was declared at P < 0.05. In phase 1, fecal scores were visually assessed daily by pen, ranging from 1 to 5 (1 = hard; 2 = firm; 3 = soft; 4 = very soft; 5 = watery feces). The frequency of diarrhea by pen were calculated by counting pigs with a diarrhea score of 3 or greater. In both trials, ADG during the first phase was improved by 30 (trial 1) or 40 g (trial 2) vs. control (P < 0.05). Final BW in piglets fed enzyme treatment was 1.4 (P < 0.05) or 1.2 kg (P > 0.05) heavier in trial 1 and 2, respectively vs. those fed the control diet. The ADFI was not affected by enzyme inclusion (P > 0.05). In addition, during the 1st phase, improvement in fecal condition (average 1.96 vs. 2.27; P < 0.05) and reduction in diarrhea incident (average 3.0 vs. 5.05%; P < 0.05) were observed in both trials when multi-enzyme treatment was fed to the piglets. In conclusion, the addition of multi-enzyme for weaned pigs improved growth performance and health condition.

scholarly journals Effect of dietary supplementation of seaweed (Ulva lactuca) and Azolla on growth performance, haematological and serum biochemical parameters of Aseel chicken

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Vijayalingam Thavasi Alagan ◽  
Rajesh Nakulan Vatsala ◽  
Ilavarasan Sagadevan ◽  
Vairamuthu Subbiah ◽  
Venkataramanan Ragothaman
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Growth Performance ◽  
Body Weight Gain ◽  
Control Diet ◽  
Dietary Supplementation ◽  
Well Being ◽  
Ulva Lactuca ◽  
Feed Conversion ◽  
Serum Biochemical

Abstract Background An effort was made to assess the effectiveness of dietary supplementation of Ulva lactuca (U. lactuca), a seaweed and Azolla individually and in combination on different physiological parameters of Aseel chicken. A total of 40 Aseel chicks of 8 weeks old were allocated into four groups, C1 (control), T1 (Azolla alone), T2 (seaweed alone) and T3 (seaweed plus Azolla). Aseel chicks in C1 were fed with formulated grower feed alone, birds in T1 had control diet with 5% Azolla, birds in T2 had control diet with 3% U. lactuca and birds in T3 had control diet admixtured with 5% of Azolla and 3% of U. lactuca. Parameters were recorded for a continuous period of 2 months in 15 days interval. Results The growth performance was found to be significant (P ≤ 0.05) during 30 days of feed trials and highly significant (P ≤ 0.01) during 45 and 60 days of treatment. Birds in T3 had a higher body weight gain, shank length and feed conversion efficiency followed with T1 and T2 compared to C1. PCV, RBC, WBC and heterophil counts were not influenced (P ≥ 0.05) by dietary treatments. Uric acid, creatinine, AST, glucose, triglycerides and magnesium levels revealed a high significant (P ≤ 0.01) variation, and cholesterol level showed significant (P ≤ 0.05) changes during 30th and 60th day of feed trials between the control and treatment groups. Total protein, globulin, phosphorus and electrolytes like Na, K and Cl levels were not significant (P ≥ 0.05) during 30th day and were highly significant (P ≤ 0.01) during the 60th day of the trial. Conclusions It could be noted that inclusion of U. lactuca and Azolla as feed supplement in grower chicken had a better body weight gain when given in combination (U. lactuca and Azolla) rather than supplemented with the sole entity. Based on the haematological and serum biochemical analysis, the supplementation of U. lactuca and Azolla at the levels included in this trial did not pose any threat to the physiological well-being of Aseel chicken.

scholarly journals 365 Effects of weaning ages on growth performance of nursery pigs fed diets with increasing lactose levels during at 7 to 11 kg body weight

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 130-130
Author(s):  
Kibeom Jang ◽  
Jerry M Purvis ◽  
S W Kim
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Feed Intake ◽  
Phase 1 ◽  
Ratio Analysis ◽  
Slope Ratio ◽  
Carbohydrate Source ◽  
Nursery Pigs ◽  
Weaning Stress ◽  
Weaning Age

Abstract Lactose is an effective carbohydrate source for nursery pigs. Weaning age could influence needs for lactose. Weaning ages can vary among producers depending on preferred management programs. This study aimed to evaluate optimum levels of lactose for pigs at 7 kg BW weaned at different ages. A total of 1,632 pigs were weaned at d21 (d 21.2 ± 1.3) or d25 (d 24.6 ± 1.1). Pigs had a common diet until they reach 7 kg BW. Within a same weaning age group, when pigs reached 7 kg body weight, they were allotted to 4 dietary treatments with 6, 9, 12, and 15% lactose. Feed intake and BW were measured after 10d feeding when pigs reached 11 kg BW. Data were analyzed using the MIXED procedure of SAS for a slope ratio analysis to test effects of lactose levels on growth performance of pigs influenced by their weaning ages. Pigs weaned at d21 had Phase 1 for 11 days whereas pigs weaned at d 25 had Phase 1 for 2 days to reach 7 kg BW. According to the slope ratio analysis, as increasing lactose intake, ADG of pigs weaned at d21 responded greater (P &lt; 0.05, 68.5%) than growth of pigs weaned at d25. There was no change of slope in feed intake of pigs weaned at d 25 by increasing lactose intake. However, G:F of pigs weaned at d 25 responded greater (P &lt; 0.05, 250%) than G:F of pigs weaned at d21. In conclusion, pigs weaned at d21 grew faster from 7 to 11 kg BW as lactose intake increased compared with pigs weaned at d25 potentially because pigs weaned at d21 had an extended time for adaptation and recovery from weaning stress until they reached 7 kg BW.

scholarly journals Growth performance, blood profile and economic analysis of broilers fed fermented mixture of cassava flour and bovine blood (cassablood) based diets

2021 ◽  
Vol 43 (1) ◽  
pp. 254-262
Author(s):  
A. O. Aniebo
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Growth Performance ◽  
Feed Intake ◽  
Body Weight Gain ◽  
Control Diet ◽  
Final Body Weight ◽  
Blood Profile ◽  
Cassava Flour ◽  
Biochemical Indices

The effect of dietary treatments on growth performance, haematological and biochemical indices of finisher broilers as well as economics of broiler production were determined in this fermented cassava flour/blood mixture code-named "cassablood". The control diet (T1) contained 0% cassablood, while diets 2, 3 and 4 contained 20%, 25% and 30% cassablood respectively. 120 four weeks old Anak broiler chicken were randomly allocated the 4 diets with 30 birds per treatment replicated 3 times with ten 10 broilers per replicate in a completely randomized design (CRD). Treatment effects on final body weight, final weight gain, feed intake and seed conversion ratio were significant (P<0.05). Birds fed cassablood based diets compared favourably with the control diet. 20% cassablood inclusion performed equally with the control diet in feed intake, body weight gain and feed conversion ratio.All dietary groups also showed no significant differences (P>0.05) in most haematological and serum biochemical indices of broilers except in cholesterol, glucose and triglyceride contentswhichdiffered (P<0.05) significantly. Similarly, chicken on 20% and 25% inclusion levels produced significantly (P < 0.05) higher economic gains in terms of feed cost per kilogram of broiler among all the treatments. Therefore, 20 - 25% cassablood dietary inclusion level was recommended in broiler diet for production and profit maximization.  

scholarly journals Effects of Purified Jatropha curcas Seed Oil-Based Diet on Growth Performance and Hematological Parameters of Albino Rats

2015 ◽  
Vol 4 (1) ◽  
Author(s):  
A Maiyaki-Musa
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Jatropha Curcas ◽  
Seed Oil ◽  
Body Weight Gain ◽  
Hematological Parameters ◽  
Control Diet ◽  
Test Group ◽  
Albino Rats ◽  
Test Diet

The effect of inclusion of Jatropha curcas seed oil, as a source of oil in the feed of animal, on growth performance, hematological parameters and histology was investigated. Feed intake, average body weight gain and mortality were also monitored. Milled Jatropha curcas seeds were subjected to oil extraction using batch method. Hematological parameters were determined using standard operating procedures. Twenty weanling albino rats with mean weights ranging from 41.57± 7.90 g, were divided into two groups. The first group was placed on soybean oil-based (control) diet (4% oil) while the second group was placed on Jatropha curcas seed oil-based diet (4% oil), for four weeks. There was a significant higher difference (P<0.05) in the growth performance of rats fed the control diet when compared with the test group. The animals placed on the control diet showed significantly higher (P<0.05) body weight when compared with the test diet during the last week of experimentation and this might be due to the low digestibility of the Jatropha curcas seed oil-based diet. The result also shows a higher percentage mortality in the group fed the test diet when compared with those fed the control diet. Hematological parameters did not differ significantly (P>0.05) in both the control and test diets respectively but a significantly higher difference in neutrophils of those fed the control diet when compared with those fed test diet. This may signify that continuous ingestion of Jatropha curcas seed oil may reduce the body’s immunity against infections. The histological assessment of liver, kidney, heart and small intestine revealed no visible lesion. Overall, the result showed that Jatropha curcas seed oil has the potential of been a source of oil in animal diet if complete detoxification can be achieved.

scholarly journals Growth Performance and Digestibility of Starter Broiler Chicks Fed Diets Containing Different Duration of Fermented Baobab (Adansonia digitata) Seed Meal

2021 ◽  
Vol 3 (4) ◽  
pp. 37-42
Author(s):  
I. Y. Gang ◽  
F. B. P. Abang ◽  
D. T. Shaahu
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Body Weight Gain ◽  
Control Diet ◽  
Nutrient Digestibility ◽  
The Body ◽  
Seed Meal ◽  
Broiler Chicks ◽  
Adansonia Digitata ◽  
Final Body Weight

A nutrient retention and growth performance study were conducted with broiler chicks to evaluate the effect of different duration of fermented baobab seed meal (FBSM). Fermented baobab (Adansonia digitata) seeds were ground and incorporated in the diets at 12% dietary level. Diet 1 (control diet) had no BSM. Diet 2 had unfermented BSM. Diets 3, 4 and 5 had baobab seed meal (BSM) fermented for 48 h, 72 h and 96 h, respectively. Two hundred and forty (240) Arbor Acre chicks at one-week old were weighed and distributed to these dietary treatments. The five (5) treatments were replicated four (4) times in a completely randomized design, with 12 birds per replicate (48 per treatment). The diets did not significantly (p>0.05) influenced Feed intake, final body weight, feed conversion ratio and protein intake across treatments. The body weight gain and protein efficiency ratio of the chicks fed 96 h fermented BSM were not significantly (p>0.05) different with those fed control diet but were significantly (p<0.05) higher than chicks of other treatment groups. Starter broiler chicks fed T4 had significantly (p<0.05) higher nutrient digestibility parameters across treatments, except for EE and CF that were highly digested by chicks fed T3 and T1 respectively. In conclusion the performance of broiler chicks fed 96 h FBSM competed favorably with those fed control diet, whereas, chicks placed on 72 h FBSM recorded better result of nutrient digestibility.

260 Growth Performance and Gut Integrity of Nursery Pigs Fed Diet with butyric Acid and Enzymatically Hydrolyzed Yeast Product

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 109-110
Author(s):  
Jinsu Hong ◽  
Hee Seong Kim ◽  
Rob Patterson ◽  
Tofuko A Woyengo
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Butyric Acid ◽  
Fluorescein Isothiocyanate ◽  
Feed Ratio ◽  
Gut Health ◽  
Weaned Pigs ◽  
Nursery Pigs ◽  
Fluorescein Isothiocyanate Dextran ◽  
Yeast Product

Abstract The objective of this study was to evaluate the effects of butyric acid (BA) and enzymatically hydrolyzed yeast product (EYP) on growth performance and gut health of nursery pigs. A total of 96 weaned pigs (initial body weight = 6.60 kg) were housed in 24 pens (4 pigs/pen) and fed 3 diets in a randomized complete block design. The diets were corn-soybean meal-based without or with 0.05% BA or 0.1% EYP. The diets were fed in 2 phases; Phase 1: d 0 to 7 and Phase 2: d 7 to 20. Growth performance and fecal score were determined by phase. One pig from in each pen was selected for measuring organ weights, gut permeability, and electrophysiological parameters of jejunum mounted in Ussing chambers. The selected pigs were sacrificed at a rate of 6 pigs (balanced for diets) per day from d 10 to 17. Dietary BA increased (P &lt; 0.05) gain to feed ratio for d 7 to 20 by 5.8% and for entire study period by 15.8%. Fecal scores were unaffected by dietary BA or EYP. Dietary EYP increased (P &lt; 0.05) weight of cecum as a proportion of live body weight by 36.4%. Dietary BA decreased (P &lt; 0.05) the flow of fluorescein isothiocyanate-dextran from mucosal to serosal side of jejunum by 31.7%, implying that dietary BA reduced jejunal permeability. Jejunal short circuit current was decreased (P &lt; 0.05) by dietary BA or EYP. However, jejunal trans-epithelial electrical resistance was unaffected by dietary BA or EYP. In conclusion, dietary BA improved feed efficiency and reduced jejunal permeability to fluorescein isothiocyanate-dextran, implying that it can improve the gut health of weaned pigs through reduced jejunal permeability to toxins. Dietary EYP increased caecum weight, implying that it can improve hindgut fermentation in weaned pigs.

scholarly journals 140 Effects of Bacillus subtilis probiotics on growth performance, diarrhea, and fecal β-hemolytic coliforms of weaned pigs experimentally infected with an enterotoxigenic Escherichia coli

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 79-80
Author(s):  
Yijie He ◽  
Kwangwook Kim ◽  
Cynthia Jinno ◽  
Lauren Kovanda ◽  
Seijoo Yang ◽  
...  
Keyword(s):  
Body Weight ◽  
Bacillus Subtilis ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Control Diet ◽  
Positive Control ◽  
Negative Control ◽  
Enterotoxigenic Escherichia Coli ◽  
Weaned Pigs ◽  
E Coli

Abstract The objective of this experiment was to investigate the effects of Bacillus subtilis on growth performance, diarrhea and fecal β-hemolytic coliforms of weaned pigs experimentally infected with a strain of E. coli (F18, express genes of LT, STb, and SLT 2 toxins). Weaned pigs (n = 48, 6.17 ± 0.36 kg BW) were individually housed in disease containment rooms and randomly allotted to one of four dietary treatments: negative control (NC, control diet without E. coli challenge), positive control (PC, control diet with E. coli challenge), and supplementation of 50 mg/kg of carbadox or 500 mg/kg of Bacillus subtilis probiotics. The experiment lasted 28 d with 7 d before and 21 d after the first E. coli inoculation. The F18 E. coli were given to pigs at 1010 CFU/3 mL dose for three consecutive d. Diarrhea score was daily recorded for each pig to calculate frequency of diarrhea. Fecal samples were collected on d 0, 3, 7, 14, and 21 PI to analyze β-hemolytic coliforms. Data were analyzed using the Mixed Procedure of SAS. Pigs supplemented with carbadox had greater (P < 0.05) body weight on d 7, 14, and 21 PI than pigs in the PC and probiotics group. Supplementation of probiotics enhanced pig body weight on d 21 PI, compared with the PC. E. coli challenge reduced (P < 0.05) ADG and feed efficiency from d 0 to 21 PI, while supplementation of antibiotics or probiotics enhanced ADG and feed efficiency from d 0 to 21 PI. Pigs in carbadox and probiotics groups had reduced (P < 0.05) frequency of diarrhea throughout the experiment and fecal β-hemolytic coliforms on d 7 PI than pigs in the PC. In conclusion, supplementation of Bacillus subtilis could enhance disease resistance and promote growth performance of weaned pigs under disease challenge condition.

scholarly journals PSVI-21 Interactive effects of Zn sources, Cu sources and phytase on growth performance in nursery pigs

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 212-213
Author(s):  
Ping Ren ◽  
Joe Cushing ◽  
Karen Wedekind ◽  
Mercedes Vazquez-Anon
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Phase 1 ◽  
Interactive Effects ◽  
Phase 2 ◽  
Initial Body Weight ◽  
Phase 3 ◽  
Nursery Pigs ◽  
Dietary Treatments

Abstract This study investigated the interactive effects of Zn sources, Cu sources and phytase on growth performance in nursery pigs. A total of 288 weaning barrows (BW = 5.71 ± 0.81 kg), blocked by initial body weight, were randomly allotted to 1 of 8 dietary treatments, with 9 pens per treatment and 4 pigs per pen. The 8 dietary treatments were arranged in 2 × 2 × 2 factorial design, with 2 Zn sources [2000 ppm Zn from ZnO during phase 1 (d 1 to 14) and 2 (d 15 to 28), and 100 ppm Zn from ZnO during phase 3 (d 29 to 42); 100 ppm Zn from Zn methionine hydroxy analogue chelate (Zn-MHAC, MINTREX® Zn, Novus International Inc., St. Charles, MO) during phase 1 to 3], 2 Cu sources [150 ppm Cu from CuSO4 or Cu-MHAC (MINTREX® Cu) during phase 1, and 80 ppm Cu from CuSO4 or Cu-MHAC during phase 2 and 3], and 2 phytase inclusion levels (0, 500 FTU/kg). Results showed that there were no differences (P > 0.10) between ZnO and Zn-MHAC groups in terms of growth performance during the entire nursery period. Compared with CuSO4, Cu-MHAC tended to increase ADG (P = 0.07) and G:F (P = 0.08) during the entire nursery period. There tended to be an interaction (P = 0.09) between Cu sources and phytase on G:F during phase 2. Specifically, without phytase supplementation, there was no difference (P = 0.63) on G:F during phase 2 between Cu-MHAC and CuSO4, whereas with phytase supplementation, Cu-MHAC increased G:F during phase 2 (P = 0.05) compared with CuSO4. In conclusion, Zn-MHAC supplementation at 100 ppm could replace pharmacological level of ZnO without affecting growth performance. Cu-MHAC could improve growth performance compared with CuSO4. Cu-MHAC exerted synergistic effect with phytase on improving feed efficiency.

Growth performance and digestibility of nutrients by weaner rabbits (Oryctolagus cuniculus) fed diets containing varying levels of cowpea (Vigna unguiculata) milling waste

2020 ◽  
Vol 47 (3) ◽  
pp. 149-154
Author(s):  
A. A. Malik ◽  
Y. S. Kudu ◽  
M. Abdullahi ◽  
M. J. Ibrahim
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Feed Intake ◽  
Body Weight Gain ◽  
Control Diet ◽  
Nutrient Digestibility ◽  
Control Treatment ◽  
Crude Fibre ◽  
Final Body Weight ◽  
Dietary Treatments

Conventional feed resources for livestock are increasingly becoming more expensive, due to competition with man; hence nutritionists are searching for cheaper, locally-available alternatives. A total of forty-five (45) mixed sex weaner rabbits, aged 5 – 6 weeks, with average initial weights of between 694.42 and 761.10 g were used to investigate the effect of varying levels of cowpea milling waste (CMW) diets on their growth performance and nutrient digestibility. They were randomly allotted to five dietary treatments with nine rabbits per treatment. The control treatment (T1) contained 0 % CMW while treatments T2, T3, T4 and T5 had 10, 20, 30 and 40 % CMW dietary inclusion levels, respectively. Clean water and feed were offered ad libitum daily to the rabbits, and record of their feed intake and growth performance were taken for 12 weeks. At the end of the 11th week, a nutrient digestibility trial was carried out. Results show that there were no significant (P>0.05) differences in final body weight, body weight gain, total feed intake and mortality among the dietary treatments. Feed conversion ratio (FCR) for diets T4 (6.65) and T5 (6.66) containing 30 and 40 % CMW respectively, were as good as that of the control diet (6.11). Dry matter and crude protein digestibility showed no significant (P>0.05) difference across the treatments. Digestibility of crude fibre (72.64, 80.16, 84.04 and 80.90 % for T2, T3, T4 and T5 respectively), ether extract (95.98, 94.90, 96.04 and 94.38 % for T2, T3, T4 and T5 respectively), nitrogen free extract (94.30, 95.18, 93.58 and 94.90 % for T2, T3, T4 and T5 respectively), as well as total digestible nutrient (83.69, 76.11, 81.67 and 80.02 % for T2, T3, T4 and T5 respectively) of the test diets compared favourably with that of the control diet (72.94, 95.23, 96.04 and 80.47 % for CF, EE, NFE and TDN respectively). Hence, it can be concluded that CMW can be used safely as a protein source and included up to 40 % in weaner rabbit diets with no detrimental effect on their growth performance and nutrient digestibility.

scholarly journals PSV-8 Glucocorticoid receptor agonist (GRA): what is the best delivery method to newly weaned pigs?

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 158-159
Author(s):  
Hailey Wooten ◽  
Hwanhee Kim ◽  
Amanda Rakhshandeh ◽  
Anoosh Rakhshandeh
Keyword(s):  
Growth Performance ◽  
Performance Outcomes ◽  
Nutrient Digestibility ◽  
Control Group ◽  
Free Access ◽  
Weaned Pigs ◽  
Delivery Methods ◽  
Nursery Pigs ◽  
Intestinal Integrity ◽  
Randomized Design

Abstract We previously found that i.m. injection of GRA, similar to in-feed antibiotics, improves measures of intestinal integrity, nutrient digestibility, and overall growth performance in nursery pigs. In addition, we have demonstrated that the mitigating effects of GRA on the stress of weaning is predominantly done by subsiding the inflammatory response that often accompanies early weaning. The objective of the current study was to explore the most practical methods for delivering GRA to newly weaned pigs. One-hundred and sixty-seven PIC pigs were weaned at 25 ±1.0 days of age (BW 7 ±1.2 kg), and assigned to fourteen treatments (3-4 pigs /pen; 3 pens/treatment). Seven treatments were tested within two sexes (gilts vs. barrows). The treatments were: 1) i.m. injection of GRA (two injections, 0.2 mg/kg BW at -1 and 3 d post-weaning), 2) two levels of in-water GRA (0.8 and 1.6 ppm), 3) in-feed GRA (2.5 and 5.0 ppm), 4) in-feed antibiotic (ANT, 100 ppm tylosin), and 5) control. Dexamethasone was used as GRA. Pigs had free access to in-feed or in-water GRA or ANT during the 1st-week post-weaning. Parameters of growth performance were measured weekly until the end of the nursery phase. A completely randomized design and repeated measurement ANOVA (PROC MIXED) in SAS were used for statistical analyses. In-water, in-feed, and i.m. GRA treatments resulted in growth performance outcomes comparable to that of in-feed ANT. Relative to CON pigs, both ANT and GRA improved ADG and G: F during the nursery phase (P &lt; 0.05). Among the delivery methods tested, 2.5 ppm of in-feed GRA resulted in superior ADG (GRA vs. CON; 0.29 vs. 0.20 kg/d) and G: F (0.63 vs. 0.40 ± 0.05), compared to the control group (P &lt; 0.02). Collectively, these results suggested that in-feed treatment is the best method for delivering GRA to newly weaned pigs.

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