Step 1: Understanding the Concept:
Restricted feeding is a management practice used during the rearing (grower) period of layer pullets.
By limiting feed intake, producers control body weight gain and organize the development of the reproductive tract.
Step 2: Detailed Explanation:
Let us analyze the physiological effects of restricted feeding in growing pullets:
- A. Hasten sexual maturity: This is incorrect. Restricted feeding deliberately delays sexual maturity.
Delaying maturity prevents pullets from laying eggs too early, which avoids the production of undesirable small (pee-wee) eggs and reduces the risk of prolapse.
- B. Increase intensity of egg production: This is correct. Controlled feeding ensures that the birds start laying at an optimal body weight, which leads to a more persistent and higher peak of egg production.
- C. Lower layer house mortality: This is correct. Birds raised on restricted diets are leaner and healthier, which reduces metabolic disorders (such as fatty liver syndrome) and lowers mortality during the laying cycle.
- D. Increase egg size: This is correct. Because the birds are more mature and have reached a larger skeletal frame size before laying begins, they lay larger, more valuable eggs.
Therefore, the correct points are B, C, and D.
Step 3: Final Answer:
The benefits of restricted feeding during the rearing period are represented by statements B, C, and D, which corresponds to Option (A).