The uti l ization of minerals in orchardgrass (Dactylis glomerata L.) fertilized with kieserite (2,240 kg/ha) was examined in spring with lactating beef cows and wether lambs. Kieserite increased the concentration of Mg in vegetative herbage from .22 to .29% (P<.01) and of S from .20 to .29% (P<.01), with little effect on other minerals. Fert i l ization also increased (P<.01) apparent absorpti...

This study was conducted to investigate the effects of L-carnitine and different levels of animal fat on performance, carcass characteristics and some blood parameters of broiler chickens. Two hundred one-day old male broiler chicks were allotted to5 treatments in 4 replicates and 10 birds in each replicate. Dietary treatments consisted of: 1) diet with 5% vegetable oil (T1), 2) diet with 5% ve...

We hypothesized that lambs discriminate the postingestive effects of P and associate those effects with feed flavor to modify feed choices. Three predictions were tested based on this hypothesis: 1) lambs will modify preference for arbitrary flavors eaten during intraruminal infusions of NaH2PO4, 2) changes in preferences are more specific than changes in osmotic load induced by salts of Na; an...

essential amino acids such as methionine have been increasingly included into diets of lambs. however, few studies have determined the effects of methionine supplementation in the general performance and economic returns of lamb production. to address this question, 21weaned male rahmani lambs were allotted to 3 dietary treatments: control diet (c), control diet plus 3.30 g of methionine/kg con...

Neonatal changes in plasma free and total iodothyronines, cortisol, glucose and urea levels have been studied in 8 control (birthweight greater than or equal to 2.5 kg) and 16 hypotrophic lambs (birthweight less than 2.5 kg) receiving limited amounts of colostrum during the first 36 h of life and then fed ad libitum. During the period of colostrum feeding, plasma glucose levels were low in both...

The plasma and salivary disposition of closantel and rafoxanide were examined following intravenous administration in adult sheep. Two studies were conducted with rafoxanide at 7.5 mg/kg and 1 with closantel using 2 doses (5 and 15 mg/kg). The pharmacokinetic profile of both drugs in plasma were best described by a 2-compartmental model with 1st-order rate constants. Plasma disposition of closa...

Newborn mammals exhibit an active expiratory upper airway closure during the first hours of extrauterine life. We have recently shown that permeability pulmonary edema led to active expiratory glottic closure in awake newborn lambs while hypoxia (inspired O2 fraction 8%; 15 min) did not. In the present study, we tested the hypothesis that expiratory glottic closure was accompanied by an increas...

Tick-borne fever (TBF) is caused by the rickettsiae Ehrlichia phagocytophila and is a common disease in sheep in tick (Ixodes ricinus) infested areas in Norway. Earlier investigations have shown that some sheep could remain infected for several months after the primary infection. In this study, the persistence of E. phagocytophila after experimental infection was investigated in 2 age groups of...

a study was conducted to evaluate effects of age at weaning on various growth characteristics and stress measures of zandi lambs. the lambs were weaned at 45 and 90 days of age. the body weights and average daily gain (adg) were monitored during the experimental period and 5 months of age. cortisol, glucose, blood urea nitrogen (bun) and lamb behavior (agitation, vocalization) were recorded bef...

The effect of 2 different oxytetracycline treatments in acute E. phagocytophila infected lambs was investigated. Twenty 5-month-old lambs of the Dala and Rygja breeds were used. Ten lambs were inoculated intravenously with a stabilate of an ovine E. phagocytophila strain. On the third day of fever, 4 lambs were given long-acting oxytetracycline (Terramycin prolongatum vet, Pfizer) (20 mg/kg) in...