Welfare and productivity of laying hens in commercial organic egg production systems in Denmark

Abstract

Plumage condition, use of outdoor run, mortality and productivity were recorded in 18 Danish commercial organic egg-producing flocks consisting of 1200–5000 hens each. Between 7 and 38% of the hens in a flock used the outdoor run, with a mean of 18%. In most flocks the majority of the hens outside stayed close to the hen house, but some farmers succeeded in attracting the hens away from the house, which reduced the percentage of hens staying close to the house to 15%. At the age of 56 weeks, six flocks had little or no plumage damage, whereas four flocks showed severe feather pecking, but here feather pecking was already evident at an age of 28 weeks. Plumage condition was not significantly correlated with use of the outdoor run. The range in mortality rate amongst flocks was 9–62%, with an average of 22%. The high mortality was partly due to outbreaks of Pasteurella, mortality reaching over 50% in two of the four afflicted flocks. In some flocks also predatory attacks and piling (causing suffocation of the lowest birds) caused mortality. Average egg production was better than reported for Danish organic and free-range non-organic farms, but feed consumption and feed conversion rate were slightly higher. The results of this study do not provide a definite answer to the question whether or not hens should be kept outside.