When should the transition from starter mash to grower crumbs be initiated in brown layer pullets, and when does early gizzard development peak?

Rearing high-quality pullets with robust skeletal frames and strong gastrointestinal tracts is the foundation of successful brown egg production. The transition from fine starter mash to coarser grower crumbs should be initiated between 5 and 6 weeks of age, once pullets reach their target weights. Early gizzard and intestinal development peaks between 3 and 6 weeks of age. Feeding structural fibers (such as oat hulls or sunflower hulls) and coarse feed particles during this period stimulates gizzard grinding activity, increasing gizzard size and muscularity. A well-developed gizzard acts as a barrier against pathogens and improves overall nutrient digestibility throughout the laying cycle. Rearing science is detailed in the Poultry Encyclopedia, high-performance pullet grower feeds and pre-starters are sold on Poultry Plaza, pullet mandi rates are updated on Poultry Rates, and healthy commercial pullet flocks are listed on Murghi Mandi.