Impacts of environmental complexity on affective states in slow-growing broiler chickens
(Gallus gallus domesticus) are unknown. Chickens' performance in judgment bias tests …

Affective state can bias an animal's judgement. Animals in positive affective states can
interpret ambiguous cues more positively (“optimistically”) than animals in negative affective …

Simple Summary Broiler chickens are conventionally housed in monotonous environments
at high stocking densities, which can negatively affect their welfare. This study evaluated the …

Affective states can be evaluated by assessing shifts in the animal's expectation of a positive
and negative outcome in response to ambiguous cues, also known as judgement bias (JB) …

High fearfulness could disrupt learning and likely affects judgment in animals, especially
when it is part of an animals' personality, ie, trait anxiety. Here, we tested whether high …

Increasing environmental complexity, ie by providing environmental enrichment, has been
suggested as a way to improve broiler chicken welfare. One issue affecting broiler welfare is …

SUMMARY A recent definition of animal welfare states that “the welfare of an animal is its
positive mental and physical state related to the fulfilment of its physiological and …

Traditionally, broiler chickens hatch in the hatchery and they are usually not provided with
feed and water until placement at the farm. This can have negative effects on their health …

Simple Summary Broiler chickens are usually housed in high-density, relatively barren
conditions that limit their opportunities to express natural behaviors and be active. This study …

Runway tests are considered indicative of underlying sociality in birds and their ability to
make social discriminations. We evaluated whether experience of a prior stressor alters the …