A law to establish Colorado as a cage-free production state has been enacted.  By 2025, the hen population in Colorado will be housed cage-free joining Pacific states Washington, Oregon and California, in addition to Michigan in the Midwest and a New England consortium.  The regulations mandate one square foot of usable floor space per hen in aviary systems and 1.5 square foot of usable floor space per hen in cage-free housing that does not permit access to vertical space, referring to slatted, all-litter or combination floor systems.