Popis: |
Group-housing of non-lactating sows is becoming increasingly widespread in commercial sow herds in European countries as a result of changed legislation. Group-housing may lead to individual variation in feed intake, stress and fear, which may impair the reproduction performance. However, whether the individual variation in feed intake and the level of stress and fear under commercial conditions is severe enough to impair the reproduction performance is not known. In a detailed farm study including 14 herds with different layouts the relations between various indicators of feed intake, stress and fear and reproduction performance were studied based on 553 focal sows. Twelve percent of all mated sows were re-mated and average litter size was 14.8 born piglets per litter. Chance of pregnancy (P |