Doug,
We have chickens, and although we haven’t had them free ranging around where the trap is because we were trying to get the sparrows interested, by looking at it I don’t think there is any way a chicken can get the seed out of the tray or get caught in it. I built a little enclosure for my trap that will keep rain off it and gets it up off the ground so I’m not afraid of them messing with it too much. I think the biggest problem you may have is the chickens standing on it and pooping making it a mess.
