Lol your chickens are getting free food and that's a bad thing? Chickens have been eating humans leftevers for centurys, trust me, they will be just fine. I would love that.
My old neighbor's dog used to kill my chickens, thank God they moved. My new neighbors started a flock of their own. Apparently they thought their baby chicks needed a mommy, so they tossed one of my silver Leghorns into their coop and locked her in. I thought I lost her do to a predator until their kid told my kid what they had done about a week or 2 later.
I was seriously dumbfounded, they seem like such nice people, but they totally just appropriated my chicken! Once their kid told them the cat was out of the bag, they returned her.