Feather pecking in poultry: The application of science in a search for practical solutions (2004)

Jones, R. B., Blokhuis, H. J., de Jong, I. C. et al.

Abstract

Bunches of string elicited substantially greater interest than other stimuly, including feathers, and white or yellow string was the most attractive. The birds' manipulation of the string resembled preening. Incorporating silver beads or moving devices reduced pecking. String sustained lengthy interest, reduced FP in HFP [high feather pecking] birds, and decreased feather damage in caged layers.