text: It has been suggested that the sight of other hens performing the behaviour increases for sham dustbathing, i.e. social facilitation, however, when tested the sight of stimulus birds had no effect on the sham dustbathing behaviour of test birds.Cite error: Closing </ref> missing for <ref> tag Therefore, it can be questioned how these birds, which have never had the possibility to dustbathe in a functional substrate, perceive sham dustbathing; do they want something they have never had (i.e. litter) or are they content to sham dustbathe?