Roy Reid Redden

• BS, MS, PhD
• Sheep Specialist at North Dakota State University

Objectives of this study were to determine effects of exogenous progesterone (via controlled internal drug releasing devices; CIDR) in combination with exogenous gonadotropins (PMSG/hCG) use either at CIDR removal or one day before CIDR removal to induce estrus and cyclicity and subsequently enhance the proportion of ewes lambing, lambing rate, pro...

The hypothesis of this experiment was that increasing the inclusion level of distiller’s dried grains (DDGS) in the diets would decrease semen quality but have no negative effects on growth performance. Following the removal of DDGS from the diet, it was hypothesized that the ram lambs would recover and become reproductively sound, independent of t...

Our hypothesis was that increasing the inclusion level of dried distiller's grains with solubles (DDGS) to feedlot lambs would increase growth and the inclusion of lasalocid (LAS; Bovatec, Alpharma, LLC, Bridgewater, NJ) would increase ADG and G:F, while not affecting digestibility, ruminal VFA concentration, and ruminal pH. Furthermore, we hypothe...

Our hypothesis was that increasing the inclusion level of dried distiller’s grains with solubles (DDGS) to feedlot lambs would increase growth and the inclusion of lasalocid (LAS; Bovatec, Alpharma, LLC, Bridgewater, NJ) would increase ADG and G:F, while not affecting digestibility, ruminal VFA concentration, and ruminal pH. Furthermore, we hypothe...

Two experiments were conducted to evaluate the effect of moderate feed restriction on productivity of lambs classified on the basis of phenotypic expression of residual feed intake (RFI). In Exp. 1, 58 fat-tailed Kurdi ram lambs (32.1 ± 4.2 kg BW) were individually fed, ad libitum, a pelleted diet (35% alfalfa hay and 65% concentrate). Feed intake...

In sheep, embryonic and fetal death during pregnancy can account for 25% to 50% of the total number of corpora lutea (and thus potential embryos). The objective of this study was to determine the effects of injectable and oral Arg supplementation provided for 14 d postbreeding on the reproductive performance of naturally stimulated fall lambing ewe...

Our hypothesis was increasing the inclusion level of dried distiller's grains with solubles (DDG) to feedlot lambs would increase growth, while the inclusion of lasalocid (LAS; Bovatec, Alpharma, LLC, Bridgewater, NJ) would increase ADG and G:F, while not affecting digestibility, ruminal VFA concentration, and pH in the rumen fluid. Furthermore, we...

Uteroplacental development is a crucial step facilitating conceptus growth. Normal placental development comprises extensive placental angiogenesis to support fetoplacental transport, meeting the metabolic demands of the fetus. Compromised pregnancies due to maternal stressors such as over or undernutrition, maternal age or parity, altered body mas...

The inclusion of dried distiller's grains (DDGS) at 15%, 30%, and 45% of the ration was hypothesized to have a decreasing linear effect on semen quality of ram lambs, while having no negative effects on growth. Following the removal of DDGS from the ration, we hypothesized that the ram lambs would recover and become reproductively sound, independen...

Small ruminant lentivirus (SRLV) infections of sheep are influenced by genetics on both the host and pathogen sides. Genetic variation in the ovine transmembrane 154 (TMEM154) gene associates with infection susceptibility, and distinct SRLV genetic subgroups infect sheep in association with their TMEM154 diplotypes. In this study, a novel SRLV subg...

The objective of this research was to determine the influence of diet particle size and lasalocid on growth and feed intake, carcass characteristics, and N balance in feedlot lambs. One hundred sixty crossbred (Suffolk x Rambouillet) lambs (31.2 kg ± 0.09 kg) were stratified by weight and sex in a completely ran-dom design and allotted to one of 16...

Abstract Text: The objectives of this study were to measure effects of maternal nutrition and rumen-protected arginine supplementation on postnatal offspring wool quality and follicle development. We hypothesized that lambs from ewes receiving diets fed to nutrient requirements would have a greater density of wool follicles and improved wool qual...

The objective of this research was to evaluate the effects of residual feed intake (RFI) determined under ad libitum feeding conditions on DMI and performance of yearling ewes fed either chopped or pelleted alfalfa hay. In Exp. 1, 45 ewe-lambs had ad libitum access to a pelleted grower diet for 63 d and individual DMI was determined using an electr...

The objective of this research was to evaluate the effects of residual feed intake (RFI) determined under ad libitum feeding conditions on DMI and performance of yearling ewes fed either chopped or pelleted alfalfa hay. In Exp. 1, 45 ewe-lambs had ad libitum access to a pelleted grower diet for 63 d and individual DMI was determined using an electr...

The objective of this study was to evaluate the effects of dried distillers grains with solubles (DDGS) on ram lamb feedlot performance, carcass characteristics, serum testosterone concentration, and semen quality. One hundred twenty ram lambs (40.4 ± 9.1 kg; Suffolk × western white face) were used in a completely randomized design to determine the...

The objective of this research was to evaluate the effects of residual feed intake (RFI) determined under ad libitum feeding conditions on DMI and performance of yearling ewes pen fed the same diet under restricted feeding conditions. In Experiment 1,48 ewe lambs had ad libitum access to a pelleted grower diet for 49 days and individual DMI was det...

A rise in the incidence of mosquito-transmitted Cache Valley virus (CVV) in lambs in 2011 prompted a study to evaluate on-animal pyrethroid insecticides to reduce mosquito attacks on sheep. Using enclosure traps for 1 night per wk for 6 wk, we compared engorgement rates of mosquitoes given the opportunity to feed on untreated sheep and sheep treate...

Reduction of feed required for normal lamb and wool production could improve the profitability of sheep producers. Our objectives were to determine growth and feed efficiency traits of Targhee sheep receiving a growing diet as ewe-lambs (Exp. 1) and a maintenance diet as yearlings (Exp. 2). Furthermore, we compared the repeatability of these traits...

Late gestation supplementation of feed additives, such as rumen undegradable intake protein (RUIP), vitamin E, Zn, and chlortetracycline, has inconsistently improved ewe/lamb productivity. In 3 experiments, Western white-faced ewes were supplemented for at least 30 d during late gestation with 204 g/(ewe.d) on a DM basis of high (HS; 12.5% RUIP, 88...

Backgrounding lambs on forage-based diets after weaning may provide producers with alternatives to traditional market-ing of lambs directly to feedlots. Our objective was to evaluate feedlot performance of lambs from different backgrounding treatments. Seventy-two crossbred lambs were randomly assigned to one of four backgrounding treatments. Treat...

The objective of the three year study at the New Mexico State University Corona Range and Livestock Research Center was to identify the periods at which reproductive wastage is greatest. Western Whiteface Ewes were randomly divided into four similar pastures in 2003, 2004, and 2005. Rams were randomly applied to each treatment at a rate of less tha...

Western White face ewes were used in two experiments to compare production responses of lambs to HIGH (12.5% rumen by-pass protein, 400 IU of supplemental Vitamin E, 176 ppm chelated Zn, and 72.7 mg/kg chlortetracycline) or LOW (7.56% rumen by-pass protein, with no supplemental Vitamin E, chelated Zn, or chlortetracycline) iso-caloric, iso-nitrogen...

The objective of the two-year study at the New Mexico State University Corona Range and Livestock Research Center was to determine the efficacy of breeding Suffolk rams to Western whiteface ewes while under range conditions. Approximately 120 ewes in 2003 and 2004, respectively, were divided among four similar pastures. Pastures were randomly assig...