You are correct, they are not "mine". It's been an unspoken agreement between my neighbors and myself that they are officially "mine" now, as they are always in my yard and sleep here. I'm fine with it, the more the merrier. They are free ranged, as is my one chicken I moved here with.. but she will wonder back to her coop at night as these 5 will stay on the porch. So I'm trying to figure out ways to re-train these 5 girls to do the same as she! It's funny, really. My girl laid her first egg on that very porch easter morning this year, and since then one of my neighbors chicks has laid all her eggs under the step every morning. I don't know what it is about the porch, but it sure would be nice to have it back!