Cherry and Morris, 2008). Thus, it is difficult to measure
exact food intake when housed in floor pens. However,
no differences were observed in the number of
times ducks fed during the observation period regardless
of the color of light under which the ducks were
housed. We did observe differences in the bouts of the
amount of drinking at the nipples lines sporadically
across the study among the various groups; thus, these
data are impossible to interpret at this time. Feather
picking and pecking is an issue with ducks and may be
ameliorated by blue-colored enrichment devices (Colton
and Fraley, 2014). Although these self- and conspecificdestructive
behaviors may be affected by colored objects
and/or colored light, these behaviors were not observed
in our study at all. Therefore, we cannot address
whether colored lights may affect these behaviors. We
did, however, observe increased motor activity at most
of the ages in ducks housed under blue light. In production
facilities, stressed ducks are typically observed