How much space does a layer hen need? – RSPCA Knowledgebase

Range Requirements - Certified Humane

The Challenges of Management for Today's High Performing Laying Hens - Lohmann Breeders

Hen Up® Scratch Grains can be fed to adult laying hens (18 weeks or older) to encourage natural pecking and feeding instincts. Made with good stuff

Organic Scratch Grains, 25-Lb

Spatial distribution, movement, body damage and feather condition of laying hens in a multi-tier system - ScienceDirect

Spatial distribution, movement, body damage and feather condition of laying hens in a multi-tier system - ScienceDirect

Determining space for a chicken house

How Much Space Do Chickens Need? - Fresh Eggs Daily® with Lisa Steele

BaseSpace Sequence Hub: Archival Storage FAQs - Illumina Knowledge

PDF) Floor Substrate Preferences of Chickens: A Meta-Analysis

Range Requirements - Certified Humane

From the ASPCA®: Here's How Nellie's is Making a Difference for Chickens