Check out these animal humane society images:
Battery Cage For Egg-Laying Hens (Takoma Park, MD)
Image by takomabibelot
95% of egg laying hens in the United States spend their entire lives in a battery cage like this one.
6-8 birds are confined to a cage this size; each bird having less room than a standard sheet of notebook paper to live her entire life. In these crowded conditions, they are unable even to spread their wings.
See also:
'No Battery Eggs' Campaign Exposes the Hard-Boiled Truth about Laying Hens (Humane Society of the United States)
Takoma Park City Council Resolution Opposing Confinement of Egg-Laying Hens in Battery Cages, October 9, 2006 [PDF]
And here's a pre-streetscape photo of the memorial to good old Roscoe
