Ethogram of comfort and aversion-related behaviour [20].

<p>Ethogram of comfort and aversion-related behaviour <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0107357#pone.0107357-Nicol2" target="_blank">[20]</a>.</p

Ethogram of alert behaviours including definitions of proximity to novel object [20].

<p>Ethogram of alert behaviours including definitions of proximity to novel object <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0107357#pone.0107357-Nicol2" target="_blank">[20]</a>.</p

Average egg weight and total egg production on a given day for aviary and cage reared birds at 20, 24, 28, 41 and 73 weeks of age.

<p>Average egg weight and total egg production on a given day for aviary and cage reared birds at 20, 24, 28, 41 and 73 weeks of age.</p