The nature of weaning, considered the most stressful and significant transition experienced by dairy calves, influences the ability of a calf to adapt to the dramatic dietary shift, and thus, can influence the severity of production losses through the weaning transition. However, the effects of various feeding strategies on the development of rumen or fecal microbiota across weaning are yet to ...

vide data on ruminal pH (pH = 6.21 ± 0.34), liquid outflow rate (LOR = 12.1 ± 4.0 L/kg DM), and ruminally digested OM (rdOM = 39.5 ± 10.3 % DM). The LOR is an index of buffer recycling/kg DMI and rdOM is an index of VFA production/kg DMI. The compliled data also included dry matter intake (DMI = 2.81 ± .87 % LW) and Acetate/Propionate ratio (A/P = 3.18 ± 0.89). Data were analyzed using GLM proc...

The aim of the study was to investigate the prevalence of lactic/ruminal acidosis in goats through the utilization of intra ruminal and haematological analyses as diagnostic tools. From a total study population of 2029 goats, 265 adult goats from 8 villages of Lahore, Pakistan were diagnosed for lactic acidosis on the basis of anamnesis and clinical signs. Confirmation was made through ruminal ...

The digestive responses and degradation of ergovaline and production of lysergic acid in the rumen of sheep offered Neotyphodium coenophialum-infected tall fescue straw at 2 ergovaline levels were investigated. Six crossbred wethers (56 +/- 3.0 kg of BW) were used in a randomized crossover design involving 2 treatments, for a total of 6 observations per treatment. The experiment consisted of tw...

Cattle feedlot diets commonly contain ethanol coproducts that are high in S. This dietary S is reduced in the rumen by sulfate reducing bacteria, resulting in an accumulation of hydrogen sulfide (H2S), increasing the risk for S toxicity. A negative correlation between H2S and ruminal pH has been observed previously. The objective of this study was to determine the effect of varying dietary NDF ...

in order to examine the effect of degradability rates of different starch sources on performance of holstein dairy cows in their early lactation, twenty multiparous lactating holstein cows (586±33.7 bw; 48.15±9.32 dim) were made use of in a randomized complete block design of four treatments during the 65 days of the experimental period. cows were fed the following diets: 1) 100% barley, 2) 67%...

Two trials were conducted to study ruminal lactic acid, histamine, tyramine and tryptamine concentrations following glucose engorgement in vitro and in vivo. Also, electrolyte changes in rumen fluid, blood plasma and urine during lactic acidosis were examined. Experiment 1 involved the addition of glucose to rumen fluid in vitro. After 30 hr of incubation, decreases in pH and increases in lacti...

The objective of this study was to evaluate the effects of different concentrations of DL-malate (disodium salt) on the in vitro mixed ruminal microorganism fermentation of soluble starch or cracked corn. Ruminal fluid was collected from a steer fed 6.8 kg of forage and 2.3 kg of concentrate supplement once daily, and mixed ruminal microorganisms were incubated in anaerobic media (40 mL) that c...

A study was conducted to determine whether bacterial direct-fed microbials (DFM) could be used to minimize the risk of acidosis in feedlot cattle receiving high concentrate diets. Six ruminally cannulated steers, previously adapted to a high concentrate diet, were used in a double 3 x 3 Latin square to study the effects of DFM on feed intake, ruminal pH, and ruminal and blood characteristics. S...

The present study was conducted to determine clinico-haematobiochemical changes in ruminal acidosis-affected South Down sheep in Kashmir valley. Thirty two healthy sheep were taken as control whose parameters were compared with thirty two sheep suffering from ruminal acidosis. Clinical parameters were measured using standard techniques. Ruminal fluid, urine and blood was examined for microscopi...