Execute the comprehensive Week 1 performance audit. Sample-weigh 100 to 150 birds across front, middle, and back pens to confirm the 175g body weight benchmark (4 to 4.5 times initial chick placement weight), calculate flock uniformity, remove all remaining brooder surrounds to grant full house floor access, and complete transition to automated feeding systems.
Seven-day body weight is the single most reliable predictor of final harvest weight and overall flock profitability. Every 1 gram of additional body weight at Day 7 translates to roughly 6 to 10 grams of additional weight at Day 42.
•Weighing only heavy, easy-to-catch birds near the door instead of catching a random pen sample across multiple house zones.
•Delaying brooder guard removal, causing high stocking density and stunting growth in Week 2.
•Abruptly removing supplemental mini-pans before verifying that all birds can reach and operate automated feeder pans.
•Submit a routine sample of 5 culled chicks to the veterinary diagnostic lab for Week 1 post-mortem audit (evaluate yolk sac absorption, bursa health, and gut morphology).
•Strictly avoid flock-wide prophylactic antimicrobial treatment at Week 1; rely on biosecurity, water acidification, and optimal ventilation.
•Check for subclinical coccidiosis or bacterial enteritis indicators during necropsy before any medication decision is considered.
•Use a catching corral to sample-weigh all birds within a defined circle to eliminate selection bias (catching only bigger birds artificially inflates your average).
•Keep automated feeder lines running frequently for short durations on Day 7 to trigger flock feeding activity across the full house length.
Seven-day body weight reflects the success of the entire brooding phase. Achieving 4.0 to 4.5 times placement weight (170–185g) proves that the digestive system, organs, and skeletal framework developed properly. Research shows each additional gram at Day 7 yields 6 to 10 grams of extra weight at market harvest.
Good uniformity means at least 80% of birds weigh within ±10% of the flock average, corresponding to a Coefficient of Variation (CV) under 10%. It is measured by bulk or individual sample weighing of 100 to 150 birds across front, middle, and back pens.
