Factors, which can adversely affect the uniformity are
crowding
disease
vaccination program
poor beak treatment
lack of perches (or inadequate perch space) and
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.
Calculating body weight uniformity
Weigh at least 100 female birds individually. Be sure the weighed birds represent an average of the birds in the house.
Cages
Weigh all birds individually in each selected cage.
Select cages evenly spread in the house, and select a combination of cages from top, middle, and lower tiers, and from both ends of the house as well as the middle.
Weigh all the birds in the same cages every time body weight uniformity is determined.
Floor
Select birds from all locations in the house.
Example of uniformity calculation
Number of birds weighed = 105
Average (mean) body weight = 1.320 kg
10% of the average body weight = 10% × 1.320 kg = 0.1320 kg
Upper body weight range = 1.320 kg + 0.1320 kg = 1.452 kg
Lower body weight range = 1.320 kg - 0.1320 kg = 1.188 kg
Count the number of weighed birds with a body weight between the upper and lower body weight range = 88
Body weight uniformity = (88 birds in weight range / 105 birds weighed) × 100 = 84%
Use the spreadsheet shown below to calculate the body weight mean (i.e., average), percent uniformity, and coefficient of variation (CV). Weigh the birds as per the instructions above and enter the body weights in the highlighted yellow fields (starting in cell B5). Leave cells blank if there is no data—do not enter a zero (0).
Factors, which can adversely affect the uniformity arecrowdingdiseasevaccination programpoor beak treatmentlack of perches (or inadequate perch space) andinadequate 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.Calculating body weight uniformityWeigh at least 100 female birds individually. Be sure the weighed birds represent an average of the birds in the house.CagesWeigh all birds individually in each selected cage.Select cages evenly spread in the house, and select a combination of cages from top, middle, and lower tiers, and from both ends of the house as well as the middle.Weigh all the birds in the same cages every time body weight uniformity is determined.FloorSelect birds from all locations in the house.Example of uniformity calculationNumber of birds weighed = 105Average (mean) body weight = 1.320 kg10% of the average body weight = 10% × 1.320 kg = 0.1320 kgUpper body weight range = 1.320 kg + 0.1320 kg = 1.452 kgLower body weight range = 1.320 kg - 0.1320 kg = 1.188 kgCount the number of weighed birds with a body weight between the upper and lower body weight range = 88Body weight uniformity = (88 birds in weight range / 105 birds weighed) × 100 = 84%ใช้กระดาษคำนวณที่แสดงอยู่ด้านล่างเพื่อคำนวณค่าเฉลี่ยของน้ำหนักร่างกาย (เช่น เฉลี่ย), รื่นรมย์เปอร์เซ็นต์ และสัมประสิทธิ์ของความแปรผัน (CV) น้ำหนักนกตามคำแนะนำข้างต้น และใส่น้ำหนักร่างกายในที่เน้นสีเหลือง (เริ่มต้นในเซลล์ B5) ปล่อยเซลล์ถ้าจะไม่มีข้อมูลซึ่งป้อนเป็นศูนย์ (0)
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