Pullet Phase
Body weight and uniformity
Uniformity = (all weighed birds – A1 – B2) /(all weighed birds)
- A1 = No. of birds >= average BW x 1.1
- B2 = No. of birds <= average BW x 0.9
Weigh minimum 100 birds
- Select cages from different tiers and also from the front, middle and back part of the house
- All the birds of the selected cage need to be weighed.
- Weigh weekly
Mortality
Daily Mortality (%) = (No. of dead birds today x 100) /(No. of live birds yesterday)
Weekly Mortality (%) = (No. of dead birds in last 7 days x 100) /(No. of live birds on day before the week starts)
Accumulated Mortality (%) = (No. of dead birds so far x 100) /(initial No. of housed birds)
Shank length or keel length
- Measure minimum 50 birds
- All the birds of the selected cage or area need to be measured
- Measure 5th week before transfer
Laying hens
Body weight and uniformity
Weigh minimum 100 birds
- Select cages from different tiers and also from the front, middle and back part of the house
- All the birds of the selected cage need to be weighed.
- Weigh weekly
Frequency
- Weigh weekly up to 30 weeks of age
- Weigh every 2 weeks
- Up to 40 weeks of age
- Weigh monthly after 40 weeks of age
Uniformity = (all weighed birds – A1 – B2) /(all weighed birds)
- A1 = No. of birds >= average BW x 1.1
- B2 = No. of birds <= average BW x 0.9
Mortality
Daily Mortality (%) = (No. of dead birds today x 100) /(No. of live birds yesterday)
Weekly Mortality (%) = (No. of dead birds in last 7 days x 100) /(No. of live birds on day before the week starts)
Accumulated Mortality (%) = (No. of dead birds so far x 100) /(initial No. of housed birds)
Efficiency parameters
FCR kg/kg = kg of feed consumed /kg of eggs produced (No. of eggs x average egg weight)
FCR kg/egg = kg of feed consumed /No. of eggs
Egg per Hen Housed = No. of eggs produced /No. of hens in the production house after the transfer
FCR kg/12 eggs = (kg of feed consumed x 12) /No. of total eggs produced
IOFC = egg mass hen housed x 0.8 /feed intake per hen housed x 0.2
Egg production
Daily Laying Rate (%) = (all produced eggs x 100) /daily birds in the farm
Weekly Lay (%) = (Sum of all produced eggs within 7 days x 100) /Sum of all the birds within 7 days
Accumulated Lay (%) = Sum of all the produced eggs /(No. of birds housed x Days in production)
Daily egg size = Total weight of produced eggs /Total No. of produced eggs
Weekly egg size = Average egg size of the last 7 days
Accumulated egg size (g) = kg of feed consumed /kg of eggs produced (No. of eggs x average egg weight)
Daily egg mass = (Daily % lay x Daily egg size) /100
Weekly egg mass = (Weekly % lay x Weekly egg size) /100
Accumulated egg mass = (Produced eggs x Egg weight) /No. of birds housed
Under grade = 1. No. of broken eggs (BE) 2. No. of cracked eggs (FE) 3. No. of dirty eggs (DE)
Daily Under grade (%) = (No. of daily BE, FE, DE x 100) /No. of all daily eggs
Accumulated Under grade = (No. of all BE, FE, DE so far x 100) /No. of all eggs so far
