For those who are interested, here is a follow-up on the EU's "new" legislation regarding battery production of chicken. However, it's in French ... but quite informative. In 2012 industrial egg-producing hens will be somewhat better off (nearly twice the surface, a bit more height etc). At least they'll now be able to stretch their wings, which is a good start. But still ...

http://www.inra.fr/productions-animales/an2004/num241/guemene/dg241.htm