This study aimed to evaluate the effects of feeding glycerol-enriched yeast culture (GY) on feed intake, lactation performance, blood metabolites, and expression of some key hepatic gluconeogenic enzymes in dairy cows during the transition period. Forty-four multiparous transition Holstein cows were blocked by parity, previous 305-d mature equivalent milk yield, and expected calving date and ra...

The aim of the present study was to determine effect adding different sized feed particles and live yeast culture (LY) rations dairy cattle on their metabolic energy balance some blood parameters under heat stress conditions. In this study, four Holstein-Fresiean (600 ± 25 kg BW) in middle lactation, which gave multiple births, were used. fed with diets containing 2 doses LY additives (0 1 g/da...

BACKGROUND: Fasting is an alternative method to induceanorexia. OBJECTIVES: The biochemical factors of liver andserum and clinical signs were measured and documented in fivenon-lactating, non-pregnant cows following eight days of fasting.METHODS:Five crossbred, non-lactating, and non-pregnantcattle were used in this study. They were fasted for 8 days_ totalfood deprivation; however, they had fr...

The objective was to study milk production, body reserve mobilization, metabolic and hormonal profiles, and ovarian cyclicity of Holstein-Friesian (HOLS) and Montbéliarde (MONT) cows under two low-input dairy production systems with seasonal spring calving: an extensive (EXT; 12 HOLS and 12 MONT) based on permanent diversified grasslands and zero concentrate, and a semi-extensive (SEMI; 12 HOLS...

The aim of this study was to investigate the metabolic and biochemical changes in plasma that occur in the reproductive rabbit doe close to the parturition, as well as if the number of offspring affects the metabolism and the health status of the doe. At -3, 4 and 12 days from parturition (-D3, D4, and D12, respectively) nine rabbit does at their third parity from a commercial hybrid line (HYPL...

This investigation's purpose was the evaluation effects of physical forms corn and forage sources on growth performance, blood parameters, ruminal fermentation Holstein calves. Forty-eight calves (38.2 ± 1.2 kg BW) were used in a completely randomized design with 4 treatments 12 replications for 65 days. The were: 1) Basal diet + mashed form wheat straw (MCWS), 2) flacked (FCWS), 3) corn+ Sugar...

ABSTRACT This study aimed to determine the impact of different post-partum disorders on milk yield and composition. One hundred fifteen Holstein cows from a commercial dairy farm located in state Rio Grande do Sul southern Brazil were monitored up 62 days post-partum. During this period, body condition score evaluation animal clinical examination conducted. Percentages fat, protein, lactose, as...

In this study, the relationships and correlations between milk production and some blood metabolites related to energy and protein balance and their effects were investigated on returning to estrus after AI in lactating Holstein dairy cows. Blood and milk samples were collected from sixty lactating Holstein dairy cows based on their reproductive status in 13-17 d post AI. BUN, MUN, glucose, tri...

OBJECTIVES This study investigated the effects of dexamethasone and insulin, when administered at 3rd or 10th day of lactation on energy and protein metabolism in dairy cows. MATERIALS AND METHODS Two hundred Holstein cows were enrolled in a randomized controlled clinical trial. The cows were randomly assigned to receive 1 of 4 treatments at 3 or 10 days in milk: control group, 10-mL i.m. inj...

In mid-to-late gestation, nutrient demand increases to meet the growth requirements of the conceptus and cows may alter metabolism in response to energy demands of pregnancy. By better understanding the metabolic role of pregnancy, there may be opportunities to better understand maintenance energy costs and improve overall feed efficiency. Eighteen mature Simmental/Angus crossbred cows, pregnan...