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Soft Perches in an Aviary System Reduce Incidence of Keel Bone Damage in Laying Hens

Fig 2

Non-damaged keel bones.

Absolute numbers and modelled % of birds with a non-damaged keel bone over the course of the experiment for each of the four perch type by genetic line combinations.

Fig 2

doi: https://doi.org/10.1371/journal.pone.0122568.g002