Dairy cows are regularly handled when moved to the milking parlor and during other routine procedures. Low-stress handling methods important in avoiding negative welfare states for dairy cattle. Tail twisting is used by some handlers prompt cattle movement. However, inappropriately with excessive force, tail can lead a broken tail. The aim of this cross-sectional study was determine cow-level f...

The effectiveness of the immunohistochemical method in determining Cu/Zn SOD concentrations in red blood cells of dairy cattle and farm-raised deer was evaluated by a computer-assisted analysis of microscopic images and scanning technique. Superoxide dismutase (Cu/Zn SOD) concentrations in erythrocytes were determined in smears of whole blood samples collected from 16 Polish Holstein-Friesian c...

Objective: Salmonellosis is a bacterial disease with a rising prevalence in the cattle industry. It is most common in dairy calves one to ten weeks of age. Salmonellosis has a serious economic impact on the cattle industry worldwide. Methods: In May 2013, a three months old male Holstein calf with the history of lateral recumbency was referred to veterinary hospital with severe depression, cach...

Objective: Salmonellosis is a bacterial disease with a rising prevalence in the cattle industry. It is most common in dairy calves one to ten weeks of age. Salmonellosis has a serious economic impact on the cattle industry worldwide. Methods: In May 2013, a three months old male Holstein calf with the history of lateral recumbency was referred to veterinary hospital with severe depression, cach...

Data were collected on the heart girth (n = 8,565; a measure of body weight) and height at withers (n = 8,568) of Holstein dairy heifers from 659 dairy farms as part of the National Dairy Heifer Evaluation Project during 1991 and 1992. Means and standard deviations for weight and height were determined for ages .5 to 23.5 mo. Third-order polynomial regression equations were derived to study the...

this experiment was aimed to study the association between the dgat1 k232a polymorphism and milk production traits and somatic cell score (scs) in iranian holstein dairy cows. the records of 408 animals from five dairy herds were randomly identified and then genomic dna was extracted from blood using the modified-salting method described by miller. rflp-pcr was performed to obtain all the polym...

This study was aimed to determinate the best model predict milk dry matter in high yielding dairy cattle. Level of (MDM) (%) is great importance. The material this consisted 2208 milking records cattle more than 40 l per day from Polish Holstein Friesian population. In estimate matter, regression daily yield (MY) (l), urea (MU), protein (MP) and fat (MF) as explanatory variables were used. To f...

The study was carried out in Sahiwal, Holstein Friesian, Jersey and crossbred cattle and Murrah, Bhadwari, Jaffarabadi, Nagpuri and Surti buffaloes maintained at different organized herds to work out the polymorphism at growth hormone locus and study its effect on birth weight. A 223 bp fragment of the gene was amplified and digested with Alu I restriction enzyme. Two alleles, L and V with thre...

External and internal factors can affect the body of livestock. consist climate, offering feed, maintenance management. Internal include biological aspects lactating dairy. This research was conducted to see microclimate relationship between milk production proportion lactation. study aims identify evaluate Friesian Holstein dairy cattle productivity based on in BPTSP HPT Cikole. used survey me...