However, users should direct all inquires about the contents to authors or originating agencies. The genetic potential of dairy goats to produce milk and fat can be improved each generation if does and bucks with the best genotypes in the current generation are selected as parents for the next generation. The practical difficulty in mating ''the best to the best'' is to evaluate which does and bucks are ''the best''. Does A doe's production is the result of both genetic and environmental factors. Methods have been developed to adjust for some of the environmental effects on production.
Adjustment is necessary to measure a doe's genetic ability accurately.
Records are adjusted to remove bias due to the effects of age and season at kidding and to project incomplete records to a standard 305-day basis. Comparisons among does freshening in the same herd-year are not affected by such factors. Genetic differences among herds could be corrected by considering the genetic values of herdmate sires. This correction becomes more effective as the accuracy of the evaluations of herdmate sires increases. 4 Bucks Evaluation of bucks for milk traits is more complicated than evaluation for growth, meat, and fiber traits or evaluation of does because bucks do not produce milk.