It is well recognized that broiler uniformity is beneficial
for optimal performance on farm. With a better homogeneity
the nutrient requirements for the individual birds
are less variable and less safety margin is needed to meet
the requirements of all birds. Therefore, feed cost can be
saved and performance improved. However, it is not only
on farm level that less variation in bird weight improves
efficiency. Today, a large part of broiler meat is purchased
by retailers and fast food chains. These customers have
rather tight specifications for their purchase and failing
to meet these specifications impairs the value of the output
from the processing plant. As discussed by Cosgriff
(2008), the lower value is related to several stages in
the slaughtering and processing of the broilers. It is estimated
that the value of carcasses out of spec decreases
by more than 40 %. Thus, poor broiler uniformity can be
a very costly matter. In this article some of the reasons
for broiler variation will be discussed and recommendations
will be given to reduce the impact of feed on broiler
flock homogeneity. Additionally the actual measurement
of homogeneity will be discussed as it is important to be
able to detect when homogeneity on farm level is less
good in order to actively improve it.