Materials and assembling is same easy as layer cage.
Drinking and feeding line can be adjusted by following chicks growing per each tier, with optimized nipple and dripping cup for pullet cage.
Sliding cage door : Just tapping plastic clip with one hand to open door easily. Secure wide space makes easy to handle chickens. Also, with horizontal opening door gives chickens more free space to the right side and left when they get feeding.
Manure belt : mounted rollers to keep tension stable of belt save maintenance cost and labor.