scholarly journals PSIII-30 Feedlot performance and carcass characteristics of Angus and Wagyu sired cattle raised to a similar body weight endpoint

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 259-259
Author(s):  
Jerad R Jaborek ◽  
Alejandro E Relling
Keyword(s):  
Body Weight ◽  
Mixed Model ◽  
Block Design ◽  
Random Effect ◽  
Design Experiment ◽  
Feedlot Performance ◽  
Incomplete Block Design ◽  
Breed Differences ◽  
Effect Of Treatment ◽  
Similar Body

Abstract Angus and Wagyu sired calves were used in an incomplete block design experiment to investigate breed differences for growth at a similar body weight. Cattle were individually fed a common corn silage based growing diet for 4 months and transitioned to a common finishing diet for the remainder of the study. Treatments were as follows: T1) Angus sired steers (n = 13) harvested at 612 kg, T2) Wagyu (LMR Fukutsuru 729T) sired steers (n = 4) and heifers (n = 5) harvested at 612 kg, T3) Wagyu (OW Yasufuku 229Y) sired steers (n = 5) and heifers (n = 8) harvested at 612 kg. Data were analyzed in SAS using the mixed model: Yij = μ + Ti + sj + eij, where Ti was the fixed effect of treatment, sj was the random effect of sex, and eij was the random error. Contrasts were made to compare T1 vs. T2 and T3, and T2 vs. T3. Receiving weight was greater (P ≤ 0.02) for Angus sired cattle compared to Wagyu sired cattle, and Fukutsuru sired cattle had greater (P ≤ 0.05) receiving weights compared to Yasufuku sired cattle. Off-test weights were similar across treatments (P = 0.49). Wagyu sired cattle required more days on feed (P ≤ 0.01), resulting in a greater age at harvest (P ≤ 0.01) compared to Angus sired cattle. Fukutsuru sired cattle tended to require fewer days on feed (P = 0.07) and be younger at harvest (P = 0.10) compared to Yasufuku sired cattle. Angus sired cattle had greater ADG (P ≤ 0.01), DMI (P ≤ 0.01), and G:F (P ≤ 0.02) compared to Wagyu sired cattle. Angus sired cattle had a lesser percentage of KPH fat (P ≤ 0.01) and tended to have more desirable YG scores (P = 0.06) compared to Wagyu sired cattle. Wagyu sired cattle had greater marbling scores (P ≤ 0.01) compared to Angus sired cattle, while Yasufuku sired cattle had greater marbling scores compared to Fukutsuru sired cattle.

scholarly journals 333 Effects of ruminally-protected lysine and Megasphaera elsdenii on performance and carcass characteristics of finishing cattle

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 134-134 ◽  
Author(s):  
Vanessa de Aguiar Veloso ◽  
Lucas Horton ◽  
Adrian Baker ◽  
Celine Aperce ◽  
James Drouillard
Keyword(s):  
Body Weight ◽  
Fixed Effects ◽  
Mixed Model ◽  
Block Design ◽  
Random Effect ◽  
Carcass Traits ◽  
Feedlot Performance ◽  
Muscle Area ◽  
Freeze Dried ◽  
Megasphaera Elsdenii

Abstract Crossbred steers (n = 448; 352 ± 25 kginitial body weight) were used to evaluate impact of Megasphaera elsdenii (ME; Lactipro advance, MS Biotec, Wamego, KS), alone or in combination with ruminally-protected lysine (RPL; USA Lysine, Kemin Industries, Inc., USA), on performance and carcass traits of finishing steers in a randomized complete block design. Steers were blocked by initial body weight and randomly assigned within block to one of 64 pens (7 steers/pen) in a 2 x 2 factorial treatment arrangement. Factors consisted of RPL (0 or 40 g/steer daily) and two step-up regimens (21-d without ME or 10-d with ME). Four step-up diets were used to transition cattle to finishing diets containing (dry basis) 60% steam flaked corn, 7% wheat straw, 30% sweet bran, and supplement. Diets were fed once daily ad libitum. Freeze-dried ME was re-hydrated and dosed orally (1x1010 CFU/steer) on d 1, and top-dressed (1x107 CFU/steer daily) onto diets daily thereafter. Data were analyzed using a mixed model with ME, RPL and the interaction as fixed effects, and block as the random effect. There were no interactions between ME and RPL (P > 0.05). Steers given ME consumed 16% less roughage compared to their counterparts without (P < 0.05), but gain, dry matter intake, and gain:feed were similar (P > 0.10). Administering ME tended to increase percentage of USDA Prime carcasses (0.5 vs 2.7%; P < 0.06). Feeding RPL did not affect feedlot performance, carcass weight, longissimus muscle area, marbling score, 12th-rib fat thickness, or liver abscess incidence (P > 0.10), but tended to increase yield grade (P < 0.07). In conclusion, use of Megasphaera elsdenii with an accelerated step-up program yielded feedlot performance and carcass traits comparable to those of cattle adapted with a conventional, 21-d step-up program, but supplemental lysine was without effect.

scholarly journals PSVII-18 Fatty acid composition of the longissimus muscle from Angus and Wagyu sired cattle at the 6th and 12th rib location

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 211-212
Author(s):  
Jerad Jaborek ◽  
Francis L Fluharty ◽  
Alejandro E Relling
Keyword(s):  
Fatty Acid ◽  
Mixed Model ◽  
Random Effect ◽  
Repeated Measurements ◽  
Longissimus Muscle ◽  
Trans Isomers ◽  
Fa Composition ◽  
Effect Of Treatment ◽  
Similar Body ◽  
Location Interaction

Abstract The fatty acid (FA) composition of the longissimus muscle (LM) of Angus and Wagyu sired cattle raised to a similar body weight (612 kg) were compared at the 6th and 12th rib locations. Angus sired steers represented T1, cattle from a Wagyu sire selected for growth represented T2, and cattle from a Wagyu sire selected for marbling represented T3. Data were analyzed mixed model with repeated measurements on animal (LM location); the model include the fixed effect of treatment, LM location, and their interaction, and random effect of sex. The percentage of 16:0, 18:1cis9, 18:3, and monounsaturated FA (MUFA) exhibited a treatment*LM location interaction (P ≤ 0.7), where T2 cattle had a greater percentage of 16:0 and a lesser percentage of 18:1cis9, 18:3, and MUFA at the 12th rib vs. 6th rib location compared with T1 and T3 cattle. The percentage of total FA lipid, polyunsaturated FA(PUFA), and PUFA:SFA ratio in the LM were greater (P ≤ 0.02) for T3 cattle compared with T1 and T2 cattle. The percentage of 18:0 was greater (P ≤ 0.01) for T1 cattle compared with T2 and T3 cattle, while T1 cattle had a greater (P ≤ 0.01) percentage of saturated FA (SFA) compared to T3 cattle. The percentage of 18:1cis9, other 18:1cis isomers, 18:2, MUFA, and MUFA:SFA ratio were greater (P ≤ 0.02) for T3 cattle compared with T1 cattle, with T2 cattle being intermediate. The percentage of total FA lipid, 18:0, 18:1 trans isomers, and SFA were greater (P ≤ 0.01) at the 6th rib LM location, while 14:1, 18:cis9, other 18:1 cis isomers, MUFA, MUFA:SFA, and PUFA:SFA ratio were greater (P ≤ 0.02) at the 12th rib LM location

scholarly journals Genetic parameters and performance of sugarcane families under cold stress in the South of Brazil

2018 ◽  
Vol 53 (5) ◽  
pp. 583-592 ◽  
Author(s):  
Mario Alvaro Aloisio Verissimo ◽  
Ricardo Augusto de Oliveira ◽  
Sérgio Delmar dos Anjos e Silva ◽  
Edelclaiton Daros ◽  
Adílson Härter
Keyword(s):  
Cold Stress ◽  
Genetic Parameters ◽  
Mixed Model ◽  
Block Design ◽  
Genetic Progress ◽  
Incomplete Block Design ◽  
Sib Families ◽  
Heritability Estimates ◽  
And Performance ◽  
South Of Brazil

Abstract: The objective of this work was to estimate the genetic parameters for the performance prediction of sugarcane (Saccharum spp.) families under natural cold stress, in Southern Brazil, and to identify the best combinations of parents aiming at the selection for tolerance to cold. Fifty-three full-sib families were evaluated in an incomplete block design, with five replicates per family, in the municipality of Pelotas, in the state of Rio Grande do Sul, Brazil. Harvest occurred in August 2013, nine months after planting and after cold spells with negative temperatures down to -2.2ºC. Statistical analyses, performed with the mixed model methodology, detected significant differences among families. Heritability estimates among progeny means were higher than those of individual heritability. Estimates of genetic progress for the traits megagrams of stalks per hectare, megagrams of brix per hectare, and number of stalks indicated gains of 93.8, 91.0, and 53.3%, respectively. A set of eight promising families that combine high estimates for yield and cold stress tolerance was obtained.

scholarly journals PSVII-9 Effects of a multi-species direct-fed microbial on growth performance and carcass characteristics of grow-finish pigs

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 216-216
Author(s):  
Mariana Boscato Menegat ◽  
Joel M DeRouchey ◽  
Jason C Woodworth ◽  
Mike D Tokach ◽  
Steve S Dritz ◽  
...  
Keyword(s):  
Growth Performance ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Block Design ◽  
Control Diet ◽  
Random Effect ◽  
Carcass Characteristics ◽  
Experimental Unit ◽  
Feeding Duration ◽  
Corn Distillers

Abstract This study was conducted to determine the effects of a multi-species direct-fed microbial (DFM) product based on lactic acid bacteria and Bacillus subtilis on growth performance and carcass characteristics of grow-finish pigs. A total of 1,188 pigs (PIC 359 × 1050; initially 25.8 kg BW) were used in a 121-d growth trial with 27 pigs/pen and 22 pens/treatment. Pigs were allotted to treatments based on initial BW in a randomized complete block design. Treatments included a control diet and the control diet with added DFM (BiOWiSH Technologies Inc., Cincinnati, OH) included at 0.055% of the diet at the expense of corn. Diets were based on corn, distillers dried grains with solubles, and soybean meal and fed in four dietary phases. Data were analyzed using a linear mixed model (PROC GLIMMIX, SAS®) with treatment as fixed effect, block as random effect, and pen as experimental unit. Overall (d 0 to 121), pigs fed the control diet had greater ADG (P < 0.05) and final BW (P < 0.001) compared to pigs fed the DFM diet (Table 1). There was no evidence for differences (P > 0.05) in ADFI or G:F between treatments. The difference in final BW resulted in heavier (P < 0.05) HCW in control pigs compared to DFM pigs, but no evidence for differences (P > 0.05) was observed in carcass yield, backfat, loin depth, and percentage lean between treatments. In conclusion, the inclusion of this multi-species DFM in growing-finishing diets reduced ADG in this commercial study. This response could be related to inclusion rate, feeding duration, or other factors not identified in this study, warranting further research to characterize the effects on pig performance.

PSVI-30 Feedlot performance and carcass characteristics of beef steers under intensive management with or without an added nutritional packet

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 446-446
Author(s):  
Andrea M Osorio ◽  
Kaue Tonelli Nardi ◽  
Igor Gomes Fávero ◽  
Kaliu G Scaranto Silva ◽  
Kymberly D Coello ◽  
...  
Keyword(s):  
Block Design ◽  
Random Effect ◽  
Vitamin B1 ◽  
Carcass Characteristics ◽  
Quality Data ◽  
Experimental Unit ◽  
Beef Steers ◽  
Intensive Management ◽  
Feedlot Performance ◽  
Yeast Saccharomyces Cerevisiae

Abstract The effects of a nutritional packet on performance and carcass characteristics of feedlot beef steers were evaluated. Thirty Angus-crossbred steers (BW = 542 ± 8.4 kg) were used in a randomized complete block design and allocated into pens with SmartFeed (C-Lock; 15 steers/treatment). Steers were consuming a steam-flaked corn-based finishing-diet, ad libitum, for the last 65-d on feed prior to slaughter, in which treatments were: 1) control and 2) a nutritional-packet [0.29% DM basis; live yeast (Saccharomyces cerevisiae; 8.7 Log CFU/g); Vitamin C (5.4 g/kg); Vitamin B1 (13.33 g/kg); NaCl (80 g/kg); KCl (80 g/kg)]. Individual BW was recorded every 14 d and carcass quality data was collected at slaughter. Steer was considered the experimental unit. The MIXED procedure of SAS was used with the fixed effect of treatment and the random effect of block. Total DMI was unaffected (P = 0.610) by treatment from d 0–65; however, control steers had greater (P = 0.030) DMI from d 54–65. The G:F was unaffected (P = 0.830) by treatment from d 0–35; however, it was greater (P ≤ 0.001) for steers fed the nutritional packet from d 0–50, and 0–65. Treatment did not affect (P = 0.920) ADG from d 0–35, however it increased (P ≤ 0.001) ADG from d 0–50 and tended (P = 0.060) to increase ADG from d 0–65. Carcass adjusted final BW tended (P = 0.060) to increase by 28% for treated cattle, whereas the Longissimus dorsi area tended to decrease (P = 0.090). No differences (P = 0.240) were observed for fat thickness, while yield-grade (P = 0.03) increased for treated cattle. The nutritional packet appears to improve performance in the final days of feeding steers under intensive management, and energy partitioning may be altered to fat deposition.

scholarly journals 183 Effect of fermentation temperature on in vitro digestibility of a finishing diet

2019 ◽  
Vol 97 (Supplement_1) ◽  
pp. 62-63
Author(s):  
Miranda K Stotz ◽  
Sebastian E Mejia-Turcios ◽  
Andrea M Osorio ◽  
Nadira Espinoza ◽  
Philip M Urso ◽  
...  
Keyword(s):  
Rumen Fluid ◽  
Block Design ◽  
Random Effect ◽  
Gas Production ◽  
In Vitro Digestibility ◽  
Ph Change ◽  
Fermentation Rate ◽  
N Concentration ◽  
Effect Of Treatment

Abstract Heat stress (HS) has been indicated to increase ruminal temperature, increase digestibility, and reduce ruminal pH of steers fed high concentrate diets. However, it is unclear if this effect is the result of greater fermentation rate, slower passage rate, or a combination. The effect of ruminal incubation temperature on substrate digestibility and rate of fermentation were evaluated. Four cannulated British-crossbreed steers (BW = 520 kg ± 30 kg) consuming an 87% (DM) concentrate diet were utilized as rumen fluid donors in a randomized complete block design with two incubation treatments (CON=39°C and HS=42°C). Within block, duplicate 125 mL serum bottles containing 200 mg of dietary substrate were inoculated with a 2:1 buffer:ruminal fluid mixture and incubated for 24 h to measure total gas production, fermentation rate, fermentation lag, pH, and ammonia-N concentration. In vitro organic matter digestibility (IVOMD) was measured separately in 100 mL centrifuge tubes. Data were analyzed using the MIXED procedure of SAS using the fixed effect of treatment and random effect of rumen fluid donor (block). There was no treatment effect on total gas production (P = 0.92) or fermentation rate (P = 0.11); however, HS began fermenting substrate sooner than CON (P < 0.005). There was a significant effect of treatment on IVOMD where HS was greater compared to CON (79.3 vs. 70.4%; P = 0.05). Final pH and relative pH change were not different (P ≥ 0.25) likely due to buffering capacity of the in vitro technique Ammonia-N concentration was greater for HS than CON (7.92 vs. 5.33 mM; P < 0.05) and may indicate a temperature effect on ruminal nitrogen availability.In conclusion, it does not appear that incubating at a greater temperature affected the fermentation rate but likely induced a change in fermentation kinetics, which may have contributed to the greater overall IVOMD

scholarly journals Effects of narasin or virginiamycin on growth performance and carcass characteristics of growing and finishing pigs

2021 ◽  
Author(s):  
Sara K Linneen ◽  
Roger A Arentson ◽  
J Jeffrey Chewning ◽  
Scott N Carr
Keyword(s):  
Growth Performance ◽  
Block Design ◽  
Animal Health ◽  
Carcass Characteristics ◽  
Experimental Unit ◽  
Finishing Pigs ◽  
Incomplete Block Design ◽  
Finishing Pig ◽  
Effect Of Treatment ◽  
Main Effects

Abstract The objective of this experiment was to determine the effects of narasin (NAR; Skycis®; Elanco Animal Health, Greenfield, IN) or virginiamycin (VIR; Stafac®; Phibro Animal Health Corporation, Teaneck, NJ) on finishing pig growth performance and carcass characteristics. Two separate experiments were conducted at the same site in 2013 and 2014. A total of 576 pigs (initial BW = 23.2 ± 0.19 kg) were housed in 24 pens with 8 pigs per pen in Exp. 1. In Exp. 2, a total of 888 pigs (initial BW = 26.2 ± 0.12 kg) were housed in 39 pens with 8 pigs per pen. Treatments consisted of a series of unmedicated corn-soybean meal diets (CON), CON + NAR (15 mg/kg), or CON + VIR (11 mg/kg) fed for 108 d (Exp. 1) or 109 d (Exp. 2). Pen was the experimental unit in both studies. Data were analyzed as a randomized complete block design with the main effects of block and treatment (Exp. 1) and as an incomplete block design with the fixed effect of treatment and the random effects of barn and barn within block (Exp. 2). In Exp.1, NAR and VIR increased (P &lt; 0.05) ADG and ADFI from d 0 to 28, and BW on d 28, 56, 76 and 97 as compared to pigs fed CON. During day 0 to 28, pigs fed NAR had a greater (P &lt; 0.05) G:F than those fed CON or VIR. Also, during d 28 to 56 pigs fed VIR had a greater (P &lt; 0.05) ADFI than pigs fed CON. Pigs fed NAR or VIR had greater (P &lt; 0.05) carcass yield than those fed CON. In Exp.2, feeding NAR increased (P &lt; 0.05) pig BW from d 54 through 96 compared to pigs fed CON or VIR. No differences (P &gt; 0.05) in ADG were detected between pigs fed VIR and CON through the first 74 d, but ADG of pigs fed VIR was similar to (P &gt; 0.05) those fed NAR from d 26 to 54. From do 0 to 109, NAR improved ADG compared to pigs fed VIR, which also had similar gain to those consuming CON (P = 0.04). Feed efficiency was similar between pigs fed NAR and VIR with pigs fed CON intermediate (P = 0.05). Pigs fed NAR had a greater (P &lt; 0.05) HCW and loin depth than those fed CON or VIR. A subtherapeutic dose of VIR showed improvements in growth performance that were similar to NAR in one experiment. Although there were differences in the magnitude of growth and carcass effects of NAR between the two studies, pigs fed NAR showed at least a tendency to have greater G:F and in some cases increased carcass weight and yield compared to pigs consuming nonmedicated feed.

scholarly journals 222 Effect of corn stalk inclusion rate on performance and rumination behavior in beef steers

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 128-129
Author(s):  
Jenny S Jennings ◽  
Catherine L Lockard ◽  
Ty E Lawrence
Keyword(s):  
Growth Performance ◽  
Mixed Model ◽  
Block Design ◽  
Random Effect ◽  
Beef Steers ◽  
Marbling Score ◽  
Design Data ◽  
Ruminal Ph ◽  
Rumen Bolus ◽  
Dietary Treatments

Abstract Coarse roughage, such as corn stalks, in feedlot diets aids in the formation of a fibrous mat within the rumen. The fibrous mat supports rumen health, buffers pH, and reduces acidosis risk in cattle consuming high-concentrate diets. Excess roughage can increase physical fill, thus lowering the animal’s ability to consume enough energy for efficient growth. The objective of this experiment was to quantify feedlot growth performance, rumination, ruminal pH and carcass quality and yield outcomes of cattle consuming a finishing diet with increasing levels of roughage. Fifty-one steers (initial BW = 295 + 11 kg) were randomly allocated to 1 of 3 dietary treatments; 5% (5CS; n = 18), 10% (10CS; n = 17), or 15% (15CS; n = 16) corn stalks (DM basis) in a steam-flaked-corn based finishing diet. Steers were fitted with a sensory collar that recorded rumination (min/d) and one-half of the steers (n = 27) received a rumen bolus that continuously monitored pH. The experiment was conducted using a randomized complete block design. Data were analyzed using a mixed model; treatment was a fixed effect and block was a random effect. As CS inclusion increased, we observed increased DM intake (P = 0.01; 7.7, 8.2, and 8.5 kg/d, respectively), decreased gain efficiency (P < 0.01; 0.18, 0.16, and 0.14 kg/kg DM, respectively), and a tendency for decreased ADG (P = 0.09; 1.34, 1.33, and 1.22 kg/d, respectively). Ruminal pH was highest (P < 0.01) for 15CS (6.28) and similar for 5CS and 10CS (6.10). Steers spent more time ruminating (P < 0.01) when consuming the 10CS diet (361 min/d) and least with 5CS diet (279 min/d). Increasing CS to 15% decreased rib fat thickness (P = 0.01), decreased calculated YG (P = 0.02), and decreased marbling score (P < 0.01) compared with the 5CS and 10CS treatments. Feeding excess corn stalks (≥ 15%) may prevent adequate energy intake, thus diminishing feedlot growth performance and carcass merit.

scholarly journals Evaluation of Brassica carinata meal as a protein supplement for growing beef heifers1,2

2019 ◽  
Vol 97 (10) ◽  
pp. 4334-4340
Author(s):  
Tessa M Schulmeister ◽  
Martin Ruiz-Moreno ◽  
Gleise M Silva ◽  
M Garcia-Ascolani ◽  
Francine M Ciriaco ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Fixed Effects ◽  
Day Treatment ◽  
Block Design ◽  
Random Effect ◽  
Brassica Carinata ◽  
Protein Supplement ◽  
Oilseed Crop ◽  
Beef Heifers ◽  
Effect Of Treatment

Abstract Brassica carinata is a new oilseed crop in Florida with the potential of producing high-quality jet biofuel. A high-protein meal (~40% crude protein; CP) is obtained as a byproduct of oil extraction; however, limited research is available on the utilization of this meal as a protein supplement for beef cattle. A generalized randomized block design was used to evaluate the effects of supplementation with B. carinata meal pellets on performance and attainment of puberty in growing beef heifers consuming bermudagrass hay (Cynodon dactylon) ad libitum. Sixty-four Angus crossbred heifers (240 ± 39 kg initial body weight; BW) were stratified and blocked (2 blocks: light and heavy) by initial BW and randomly allocated into 18 pens over 2 consecutive years (10 in year 1 and 8 in year 2). Within block, pens were randomly assigned to 1 of 2 treatments: 0 (CTL) or 0.3% of BW/d (as fed) of B. carinata meal pellets (BCM). Blood samples and BW were collected weekly for 70 d, before daily supplementation. Data were analyzed using PROC MIXED of SAS with repeated measures. Model included the fixed effects of treatment, day, treatment × day interactions, block, and block × treatment interactions, with the random effect of year. Plasma was analyzed for concentrations of progesterone, triiodothyronine (T3), thyroxine (T4), ceruloplasmin (Cp), and haptoglobin (Hp). An effect of treatment was observed (P ˂ 0.01) for ADG between CTL (0.14 kg) and BCM (0.42 kg). There was no treatment or block (P > 0.05) effect for concentrations of T3, T4, or Hp; however, there was an effect of day (P < 0.01) for T3, T4, and Cp. An effect of treatment (P ˂ 0.01) was observed for Cp, with CTL having greater concentrations compared with BCM. Time to attainment of puberty did not differ (P = 0.93) between treatments. Feeding B. carinata meal as a protein supplement at 0.3% of BW/d is a viable option for increasing ADG of growing beef heifers, without affecting attainment of puberty, thyroid hormone status, or eliciting an acute phase response.

Offering concentrates either before, with or after forage and its effect on digesta passage rates and mean retention times in ponies given either oat straw or grass haylage as a basal forage

2006 ◽  
Vol 35 ◽  
pp. 183-187
Author(s):  
J. J. Hyslop
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Design Experiment ◽  
Incomplete Block Design ◽  
Oat Straw ◽  
Balanced Incomplete Block ◽  
Digesta Passage ◽  
The Uk ◽  
Practical Question ◽  
Horse Owners

Most mature horses and ponies in the UK are given restricted amounts of concentrate and forage diets in order to avoid excessive nutrient intake and obesity, usually in a number of small meals per day. One practical question often asked by horse owners relates to the timing of concentrate feeding relative to the timing of forage provision. The objective of this study was to examine the effects of feeding concentrate meals either before, with or after forage when either oat straw or grass haylage was offered as the basal forage. Actual dry matter intakes and diet digestibility values from this study have been published previously (Hyslop, 2004). This summary details the effects of offering concentrates either 2 hours before, along with or 2 hours after forage provision on digesta passage rates and mean retention times in mature ponies.6 mature Welsh-cross pony geldings (mean LW 298 kg: s.e. 16.2) were individually housed and used in an eight treatment, 6 x 4 partially balanced incomplete block design experiment consisting of four 21 day periods.

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