SPRING SUMMER BONUS MAGAZINE 2026

development, which are key for consistent egg grading. Such growth patterns typically result in synchronised onset of lay and a tighter egg size distribution. Birds entering the laying phase with this level of uniformity are more likely to produce a higher proportion of medium-to-large eggs earlier in production, improving grading efficien- cy and overall profitability. 5. The transition phase This is where profits are made or lost. Moving birds from rearing to the laying house is a critical turning point. At this stage, body weight and physiological readiness determine how birds respond to light stimulation. Expect the following: • Underweight birds: Late starters, small eggs, prolonged catch-up. • Overweight birds: Early layers, oversized eggs, shell quality and prolapse risks, quick to get out of lay. • Non-uniform flocks: All sizes at once, small, medium, and large eggs, as well as a lower and often delayed peak. These inconsistencies directly reduce grading efficiency, increase sorting costs, and lower overall returns. As an example, Farm X rears its own pullets to ensure that they have better control over the outcomes of the latter. Birds are transferred while given 14 hours of light during the last week of rearing and are subjected to similar lighting, though stimulation to reach 16 hours of light happens quite rapidly at the laying shed. Figure 3 demonstrates excellent flock uniformity at transfer, with birds reaching peak production rapidly and maintaining high persistence above 94% for an extended period. Such performance is typically associated with well-managed rearing, consistent body weight uniformity, and good flock health history. This level of production stability generally translates into improved egg grading consistency, with a higher proportion of large and uniform eggs throughout peak production. 6. Expected grading outcomes Based on the strong growth pattern and excel- lent flock uniformity, good egg grading perfor- mance can be expected throughout the laying cycle. Birds entering production with adequate body reserves and uniform development typi- cally produce consistent egg sizes and improved grading efficiency. The goal is not just to produce the greatest pul- let weights, but eggs that pay better. For more information regarding egg grading, please contact your De Heus technical advisor - https:// www.deheus.co.za/meet-our-team. Figure 3: Farm X’s performance vs Hyline production curve www.deheus.co.za | 031 785 1575 | infosa@deheus.com www.agribonus.co.za Spring/Summer 2026 BONUS 151