More livestock producers are seeking natural alternatives to antibiotics and antimicrobials, and searching for supplements to enhance growth performance, and general animal health and well-being. Some of the compounds currently being utilized and studied are live yeast and yeast-based products derived from the strain Saccharomyces cerevisiae. These products have been reported to have positive e...

The objective of this study was to further the understanding of the effects of dietary protein and energy supplements on growth, performance, feed intake and grass forage digestibility in growing meat goat wethers. In Experiment 1, an 18% CP complete goat pellet was offered alone (control diet, C) or added (+), or not, as supplement to three grass hays (coastal bermudagrass, CB; Tifton 85 bermu...

ABSTRACT: This study evaluated the effect of dietary net energy (NE) levels on growth performance and carcass characteristics barrows from 30 to 70 kg body weight (BW). Sixty with initial (IBW) 31.94 ± 3.54 final (FBW) 71.98 5.99 were allotted one five NE (2.40, 2.45, 2.50, 2.55, 2.60 Mcal kg-1), using a completely randomized block design six replicates two per replicate. The experimental perio...

Two studies were conducted to assess the effect of protein source and microencapsulated sodium butyrate (MSB) inclusion in pelleted starter mixtures on growth performance, gain feed (G:F) ratio, nutrient digestibility, selected blood metabolites calves. In study 1, 28 Holstein bull calves (8.7 ± 0.8 d age 43.0 4.4 kg; mean SD) allocated 1 4 treatments a 2 × factorial arrangement fed mixture con...

Replacing dietary starch with sugar and sodium-propionate has been reported to improve performance in ruminant animals. This experiment was conducted to determine the effects of replacing different sources of energy with barley grain in dairy calves′ starter on weaning, dry matter intake, average daily gain (ADG), feed efficiency, skeletal growth, and fecal score. A total of 21 male calves (42 ...

To alleviate the need for daily injection of porcine somatotropin (pST), a sustained-release implant (pSTSR) was devised that continuously delivers a daily dose of 2 mg of pST for 42 d. Ninety-six white composite (Large White x Landrace) finishing barrows (83.6 +/- 1.2 kg BW) were assigned to receive zero or two pSTSR implants (4 mg pST/d) and to consume one of six diets differing in total Lys ...

Background: The prohibition of the use antibiotics in lamb feeding requires search for natural alternatives that can improve productive performance and ruminal fermentation parameters. Herbal mixtures function as cost-effective substitutes growth promoters since an extraction or purification process is not required. Methods: An experiment was conducted to evaluate effect Chebulic myrobalan, Ter...

The objective of this study was to determine the true digestible P requirements of 20- to 40-kg pigs by the broken-line regression analysis of growth performance using 6 levels of true total-tract digestible P. In Exp. 1, 24 barrows (initial BW=25.2±1.0 kg) were used to determine the true total-tract digestibility (TTTD) of P in monocalcium phosphate using the regression method. The dietary tre...

The aim of this study was to evaluate the short- and long-term effects initial serum total protein (STP) concentration, average starter feed intake (SI) during last week preweaning period, daily gain (ADG) on growth, fertility, performance Holstein heifers their first lactation. Eighty-four female dairy calves were weaned at d 56 age then continued until end Growth performance, including body w...

Abstract Background In the process of pig breeding, average daily gain (ADG), days to 100 kg (AGE), and backfat thickness (BFT) are directly related growth rate fatness. However, genetic mechanisms involved not well understood. Copy number variation (CNV), an important source diversity, can affect a variety complex traits diseases has gradually been thrust into limelight. this study, we reporte...