Loose chickens probably aren't the same as feral chickens, I suppose. And yet there are loose chickens not claimed by anybody, with no set home in which to roost, running around in many communities. Fair Oaks, California is one of them. There is even a Chicken Festival there, celebrating them.
http://www.fairoakspark.org/index.php?option=com_content&view=article&id=127&Itemid=188
"History of chickens in Fair Oaks: While orange and citrus groves from the early 1900s have been replaced by homes, chickens continue to roam freely throughout town as they have for over 100 years. Featured in People Magazine and the subject of television, radio and newspapers stories, chickens that roam in Fair Oaks village delight visitors who flock from around the globe to feed and take pictures of them. The Fair Oaks Chicken Festival is a celebration of the rural history and present village atmosphere in Fair Oaks, California, colonized around 1895."
There are free range chickens on a street in West Sacramento where I often take my lunch breaks. They started out belonging to a resident there, but now they don't belong to anybody. A smattering of residents on that street DO ....ummmm.... feed chickens they claim as their own.
One fellow owns a gorgeous Buff Orpington roo and a nice hen. I admire that roo frequently. Of the "loose" free range chickens, of many non-descript breeds, I watched one hen with THIRTEEN chicks cross the road there, earlier this Spring.
Perfect place for a nice lunch break.