On Day 13, one day prior to the major 14-day milestone, farm managers must conduct a rigorous sample weighing and uniformity assessment. Catching birds randomly across three distinct zones (front, middle, back) allows calculating the Coefficient of Variation (CV). Birds lagging significantly behind are moved to an auxiliary recovery pen with lowered feeders and extra care.
Uniformity is the single greatest determinant of final slaughterhouse profitability and automated processing yield. Uneven flocks result in excessive feed competition, underfed runts, overfed heavy birds, and degraded flock FCR.
•Sampling birds only near the shed entrance door where birds are often lighter or heavier than average.
•Weighing only 10 or 20 birds, which creates massive statistical bias and false uniformity figures.
•Ignoring small runts and leaving them to compete with aggressive, heavy pen mates.
•Subclinical enteritis and poor gut integrity are the leading hidden causes of poor Week 2 uniformity. Check gut wall thickness and mucosal health during any routine cull necropsies.
•Veterinary Escalation Threshold: If more than 2% of the flock exhibits severe stunting, ruffled plumage, and pasty vents, submit gastrointestinal tracts to the avian diagnostic lab for reovirus and enterovirus screening.
•Always catch every single bird inside your catch frame without selection bias. Never pick out the biggest or easiest birds to catch, or your uniformity calculation will be worthless.
•Give birds in the recovery pen extra drinker nipples and shallow feed pans with high-protein crumble to allow them to catch up before the grower phase.
Weigh 100 birds randomly across 3 zones. Calculate the average weight. Determine the range of ±10% of that average (e.g., if average is 435g, ±10% range is 391g to 478g). Count how many birds fall within this range. If 82 out of 100 birds are in range, your flock uniformity is 82%.
Target uniformity is 80% to 85% or higher (Coefficient of Variation CV < 10%). Below 75% indicates significant management or feeding equipment inequality.
Target body weight is approximately 435g with daily feed consumption of 102g and water consumption of 183ml.
