Muhammad Shuaib, Abdul Hafeez, Shahrood Ahmed Siddiqui, Anwar Mahmood and Muhammad Shahkar Uzair, 2025. Combined Effect of Soybean Hulls and Enzyme (β-Mannanase) on the Production Performance and Economics in Golden Brown Laying Hens (RIR×Fayoumi) During the Mid-Peak Production Period. Pakistan J. Zool., 57: 2171-2176. DOI: https://dx.doi.org/10.17582/journal.pjz/20230309160336