These results show that several measures of optical flow were
significantly correlated with key welfare measures in broiler
chickens. Specifically, mean optical flow rate in 30-day-old birds
was negatively correlated with flock mortality, and both the skew
and kurtosis of the movement distributions were positively correlated
with % flock mortality, % culls, % birds scored as having
hockburn and การเดินที่ผิดปกติ. Strikingly, some of these correlations
were already apparent when the birds were much younger than
30 days. As early as 15 days of age, the skew and kurtosis of optical
flow provided information about which flocks would end up having
higher mortality and damaged hocks 20 or so days later. Over
a week before the gait scoring was done, skew and kurtosis already
indicated which flocks were most likely to be scored as having the
best and worst gaits