According to recent research from Fuchinobe, Japan, "1."
"The advantages and disadvantages of various housing systems for laying hens were compared as a pilot study for work in commercial conditions. 2. At 16 weeks of age, 284 hens were introduced into one of 6 housing systems: two types of conventional cages (small: SC; large: LC), furnished cages (small: SF; large: LF), and non-cage systems (single-tiered aviary: SA; free-range: FR). 3. We evaluated the welfare, egg production, and immune response of the birds in these housing systems, built in the same location, for 18 months. For welfare evaluation, we examined their ethology, physiology, anatomy, production, and physical …
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