The fictional company changed the sounds of the chicks.

For the experiment, scientists required 38 chicks aged three to seven days, divided into two groups of 19 individuals (11 females and eight males). During the study, only 18 chicks were retained as subjects, excluding, in particular, the smallest ones. Observations were conducted under the supervision of a zootechnician in strict accordance with the protocol.

The essence of the experiment was to isolate the chicks from others by placing them in a box for 30 minutes. In one scenario, to simulate "company," a mirror was placed in front of the chicks, while in another, it was turned towards the wall.

It was found that the reflection, creating the effect of the presence of other chicks, reduces the anxiety that arises. In complete solitude, the birds, being highly agitated, experience a state akin to depression and emit high-pitched, sharp, and prolonged cries.

Overall, as noted by the scientists, the findings of the new study align with results obtained from research on the behavioral patterns of mammals. They plan to further investigate whether similar connections exist between affective states and vocalizations in turtles, crocodiles, and geckos, as their "vocal apparatuses" are similar to those of chickens.

Such indicators can be used for the automatic detection of emotional changes in animals kept in captivity. This will allow humans to care for their well-being, which directly depends on both the level of safety and the presence of a social environment. Moreover, there is no need for expensive equipment or high-tech solutions. Non-invasive assessment methods can be applied in neurophysiology, as well as for studying animal behavior and cognitive functions.

The scientific article has been published in the journal Applied Animal Behaviour Science.