(47)
Factors, which can adversely affect the uniformity are
l crowding
l disease
l vaccination program
l poor beak treatment
l lack of perches (or inadequate perch space) and
l inadequate nutrient and energy intakes.
In other words, ensure that flocks have adequate feed, light, air (quality), and water (i.e., the acronym
'FLAW') at all times. See also the section on monitoring body weight.