Those chickens on the islands are reckless. They'll step out in front of a car and look at you like it's your problem.Heh, heh, the REASON there are so many is that people feed them! We have a state park on Oahu where feral cats AND feral chickens hang out together. They never have a problem because they are all well fed. I think it's the humane society but it may be another organization which takes care of the feeding. There are signs NOT to feed them because it's being done in a healthy manner for the animals.
Our neighborhood which is condos and SFHs has loads of chickens. People feed them. We hear the roosters every morning (and sometimes at night.). I had to brake for a "flock" running across the road today.
We did stay at a condo right by Ted's bakery on the north shore once. There were a couple feral cats running around so we beefed them up the best we could throughout the week.
Puerto Rico has a spot in Old San Juan where all these pigeons congregate. Had to also buy bird seed at Walmart and fill their guts. It's cheap entertainment.