What HDP is realistic?

Peak HDP is 92-96% for 8-10 weeks; average over 18-90 weeks lands 82-86% for modern brown layers under good management. Older or stressed flocks drop 3-5 points.

Extended lay (to 90-100 weeks) is standard with strong bone and eggshell quality; total eggs/hen can exceed 500.

Egg Production

Layer output — eggs per cycle.

Compute total eggs per flock, average hen-day production and daily peak from placement, hen-day % curve and cycle length.

Inputs

Hens placedLaying cycle (weeks)18-72 weeks of age typical (54 weeks in lay).Average hen-day production (%)Modern brown layers average 82-86% HDP over 18-90 weeks.Cycle mortality (%)

Results

Effective HDP: 82.0%
Eggs / hen placed: 290
Total eggs: 28.95 M
Peak daily eggs: 91180

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FAQ

Common questions

What HDP is realistic?: Peak HDP is 92-96% for 8-10 weeks; average over 18-90 weeks lands 82-86% for modern brown layers under good management. Older or stressed flocks drop 3-5 points.
Extended cycles?: Extended lay (to 90-100 weeks) is standard with strong bone and eggshell quality; total eggs/hen can exceed 500.