I dont know, I guess I look at it a little differently. They are your pets right? So it is your responsibility to keep your pets contained in your yard regardless if other chickens are running amok on the island. I guess I see it like this: How would you feel if someone just let their dogs run loose? Some people just dont like other peoples pets in their yards. I know it drives me nuts when someones dog/cat comes into my property and poops/digs in my trash when I pick up after my own pets. Ugh - its so very aggrevating especially when they bother my chickens and get them all aggrevated. We also have people up the road that have chickens and I would be mightly upset if their chickens got loose and into mixing with my birds or into my garden. I love my chickens but not theirs....I dont let my own girls into my garden or flowerbeds so I certainly dont want anyone elses in there either.
Also look at it like this: who would be at fault if that persons free dog/cat killed one of your birds that were also free roaming? Neither pet were in either owners respective areas....I guess I just like to keep my pets/farm animals in my control at all times to avoid conflicts such as above.
I hope you can get your pen up and running so you can keep all your beautiful birds safe, happy and healthy
They are very pretty indeed!
PS> I too would love to own a mango tree in my back yard!
Also look at it like this: who would be at fault if that persons free dog/cat killed one of your birds that were also free roaming? Neither pet were in either owners respective areas....I guess I just like to keep my pets/farm animals in my control at all times to avoid conflicts such as above.
I hope you can get your pen up and running so you can keep all your beautiful birds safe, happy and healthy

PS> I too would love to own a mango tree in my back yard!