Manual catching of commercial broilers at the end of each growth cycle is widely recognized as one of the most labor-intensive, chaotic, and loss-prone operations in poultry farming. Catching crews working in dark, dusty sheds frequently cause bird stress, bone fractures, wing bruising, and dead-on-arrival (DOA) losses that can exceed 1.5% of total flock value.
Automated broiler harvesting cage systems featuring pull-out plastic bottom slats transform this bottleneck into a smooth, mechanical conveyor process that cuts catching labor by over 70% while protecting meat quality.
Mechanical Principles of the Pull-Out Slat Floor
In standard broiler battery cages, birds live on virgin polypropylene (PP) slatted floors engineered to support bird weight while allowing droppings to pass through onto the manure belt beneath. In an automatic harvesting cage system, these floor grids are engineered as retractable sliding cassettes or hinged pull-out panels.
During the 35 to 42-day rearing period, the floor slats remain securely locked in position, providing comfortable footing that prevents footpad dermatitis and breast blisters. On harvest day, operators unlock the floor release mechanism tier by tier. As the plastic slat is slid outward or retracted, broilers gently descend a few centimeters directly onto the underlying heavy-duty polypropylene manure belt.
Conveyor Transfer and Catching Speed Benchmarks
Once birds are situated on the PP belt, the belt drive motor is engaged at a controlled conveying speed of 6 to 8 meters per minute. The belt smoothly transports birds longitudinally to the rear of the poultry house.
At the end of the cage row, birds transfer onto a padded vertical lowering de-escalator or transverse cross conveyor that conveys them directly onto an inspection table or automated poultry transport crate packing station outside the house. A single automated broiler cage house can harvest between 4,000 and 6,000 broilers per hour with only 3 to 4 operators overseeing crate loading, compared to 12 to 15 manual catchers required for floor operations.
Impact on Carcass Quality and Meat Processing Yields
Processing plant inspection records demonstrate substantial commercial advantages for cage-harvested broilers over manually caught floor birds:
1. Reduced Wing Bruising & Hematomas: Wing fractures and blood clots drop from an industry floor average of 2.0–3.5% to under 0.4%, preserving valuable breast and wing meat for retail cuts.
2. Lower Dead-on-Arrival (DOA): Eliminating chasing, corner piling, and smothering in the dark reduces farm-to-shackling mortality significantly.
3. Rapid Cleanout Downtime: Once broilers are harvested, the pull-out slats and manure belts can be pressure-washed and disinfected in place, shortening downtime between bird cycles from 14 days down to 7 to 9 days.
Related Technical Guides & Systems
Broiler Battery Cages vs Floor Rearing