This is my first chicken-owning experience. Been free range 100% the whole time since they've been in the coop (about 6 weeks now.) The have about 1.5 acres to roam, and are locked in very tight at night in their coop.
So far we've had no issues...
except when they invited themselves into our neighbors basement and pooped all over the place.
He's a very relaxed guy and said it was no big deal. I promised to pay him back in eggs when the time came. We're a little more adamant that we have our temporary fence up between his place and ours now though, as I don't want to make enemies in the neighborhood

We're still working on getting a "real" fence for the whole property.
We even survived a dog
non-attack. Our terrier-mutt-mix killed 2 of our chicks very early on and we were terrified that he would go after the chickens. He got out thanks to the 3 year old learning how to work the dead-bolted doors, but he paid no attention to the now-larger birds. He did enjoy eating and rolling in their poop though
. Still smells better than when he rolls in the deer pooh at least. We're relieved and pleased that he's OK with the chickens, and as an added bonus, he LOVES to chase raccoons and other intruding animals.