I have one chicken that I know is smart. She will get in another one of my pens and eat the chicks food. I'll open the door and tell her to get going, she looks up at me moves out of their coop but then in another 20 minutes I need to do it again. But she does know what it means when I say get going.
One of my hens, a red sex link, is so smart that she know when I have food to give her and when I haven't, and what's more when I so she mimics eating something on the floor so the others will check it out, and then she sprints towards me to receive her treat