Vegetation cover in outdoor enclosures reduces feather pecking in farm-reared red-legged partridges (Alectoris rufa)

Feather pecking is a major problem in intensively reared birds, leading to welfare issues, chronic stress and economic losses. Despite the ample literature on how to improve the living conditions in the poultry industry, very little attention has been paid to gamebird species. The red-legged partridge ( Alectoris rufa ) plays a crucial role in the ecosystems of the Iberian Peninsula and also holds significant socio-economic importance in rural areas, as it is the primary species for small game hunting. Our aim was to experimentally test whether improved housing conditions with abundant natural vegetation cover reduce feather pecking and enhance body condition and growth in red-legged partridges. For two years, we compared the degree of feather pecking in red-legged partridges raised in two types of enclosures: a) in the absence of vegetation and b) with abundant natural vegetation. We also took morphometric measures (body weight and tarsus length) of the birds. We found that feather pecking varied both according to vegetation cover and bird age. Chicks aged between 42 and 67 days old exhibited a higher degree of feather pecking than adults. Vegetation cover reduced feather pecking in adults in one of the years of study and in chicks in the other. Additionally, we also found partial support that the presence of vegetation can improve body condition, as during one year, chicks raised in enclosures with vegetation were marginally heavier than those raised without vegetation. These findings suggest that the presence of vegetation might be a contributing factor in mitigating the development of abnormal behaviours in captive red-legged partridges. Future studies are necessary to evaluate what additional measures can be implemented to enhance the effectiveness of a vegetation enriched environment. Additionally, future studies should aim to investigate the effects vegetation cover in aviaries on other parameters relevant to the welfare of these birds, such as the physiological stress response and other specific behavioural traits. • Vegetation cover can reduce feather pecking in captive red-legged partridges. • Chicks aged 42–67 days old exhibit higher levels of feather pecking than adults. • Chicks in vegetation-enriched environments had higher body mass in one trial.