Selecting and Culling Dairy Cattle 61

Selecting and Culling Dairy Cattle 61 - Oregon State University

Selecting and Culling Dairy Cattle. M. J. Gamroth. Selecting standards. Selecting good dairy animals is easier today, thanks to U.S. Department of. Agriculture ...

To Keep or To Cull

Often times, choosing when to replace a dairy cow is more difficult. There are still times that involuntary culling is necessary. For example, if a cow dies ...

Theoretical aspects of culling and selection in dairy cattle

A theoretical analysis is made of the optimal culling or selection policy among cows to maximize mean yield in herds which do not breed bulls.

Invited Review: The welfare of cull dairy cows

The literature discussed below indicates that some culling decisions are made at a herd level for efficiency reasons, and some are required for individual cows ...

Genomic and Phenotypic Udder Evaluation for Dairy Cattle Selection

The traditional point of view regarding dairy cattle selection has been challenged by recent genomic studies indicating that livestock productivity prediction ...

Selection on Yield and Fitness Traits When Culling Holsteins During ...

Cows retained for ≥2 lactations had first-parity SCS that were 0.34 to 0.62 lower (more favorable) than those of cows culled during first lactation; first- ...

Culling decisions, duration of transport, and effect on cow condition

For 11 mo, data were collected from 20 dairy farms, livestock markets, and abattoirs. Cows' body condition, lameness, and udder condition (as ...

Culling and mortality of dairy cows: why it ... - F1000Research

3,61 Hence, establishing shelters and shades around the farm ... from selected dairy farms. Am J Anim Vet Sci. 2014 [cited 2019 Apr.

Culling reasons and risk factors in Estonian dairy cows - PMC

The overall culling rate of Estonian dairy cows was 26.24 (95% CI 26.02; 26.46) per 100 cow-years. The most common reasons farmers stated for culling were feet/ ...

Reasons and Criteria for Selecting and Culling Dairy Cows in Small ...

The results showed that most farmers did not cull cows due to low milk production or aging (71.43%, 72.53%) and used 5 to >12 insemination ...

The association of dairy cattle longevity with farm level technical ...

In the Netherlands, the average age of culled dairy cows is 5.9 years (3, 4). This average age of culling is far below the potential natural ...

Dynamics and Strategies for Culling in a Dairy Herd

Culling dairy cows from the lactating herd and replacing them with heifers are essential to maximize herd profitability.

Reasons for disposal and cull cow value of Holstein cows compared ...

Research studies have in- dicated that high milk and protein production, lactation persistency, and dairy herd expansion are associated with a ...

Culling reasons and risk factors in Estonian dairy cows

The overall culling rate of Estonian dairy cows was 26.24 (95% CI 26.02; 26.46) per 100 cow-years. The most common reasons farmers stated for ...

Culling the Commercial Cow Herd: BIF Fact Sheet | MU Extension

Several criteria must be applied when culling the cow herd. Cull open cows or cows not raising a calf to weaning unless economic conditions ...

Genomic selection in dairy cattle: Integration of DNA testing into ...

AbstractGenomic selection offers many advantages with regard to improving the rate of genetic gain in dairy cattle breeding programs.

Descriptive study for culling and mortality in five high-producing ...

High turnover rate in dairy farms due to culling and mortality is associated with poor animal welfare, an increase in production costs and ...

Cull Cow Grazing and Marketing Opportunities

Many producers simply choose to dispose of cull cows as quickly and easily as possible with little thought about the potential to optimize the salvage value of ...

Analysis of culling records and estimation of genetic parameters for ...

The results showed that 27.11% of cows were culled voluntarily under the farmers' command. The number and reasons for culling animals varied considerably over ...

Improving the accuracy of predictions for cow survival by multivariate ...

Workie ZW, Gibson JP, van der Werf JHJ (2021) Analysis of culling reasons and age at culling in Australian dairy cattle. Animal Production Science 61, 680–689.