Breeding record analysis in pig herds and its veterinary applications--1: Development of a program to monitor reproductive efficiency and weaner production
Pepper, T.A.; Boyd, H.W.
Veterinary Record 101(10): 177-180
1977
ISSN/ISBN: 0042-4900 PMID: 919248 Document Number: 116234
Analyses of breeding records and herd efficiency factors are important for veterinary surgeons supervising reproductive efficiency and piglet performance in breeding herds. These data include: the number of litters produced per sow per year; the distribution of weaning to service intervals; the number of sows returning to service by 30, 60, 90 and 120 days; the percentage of sows farrowing to first service; the percentage of sows found to be not pregnant; and the percentage of sows aborting. Boar performance data, piglet mortality percentages, piglet growth rates, feed efficiency factors and the percentage of sows culled from the herd are also analysed. A computer program was developed to produce these and other data from simple breeding records.