Black Vulture Funeral
Chicken And Cow Together
Chicken Counting
Here’s where you have to be very careful of a Clever Hans effect. It would be good to see this same behavior in a lab setting - no human, just a die that rolls itself to a random number then the chicken has to walk some distance away after pecking. However, if you look at this video I do think the chicken starts to walk away right after the last peck and isn’t picking up a cue from the human.
There are lots of birds that are known to hold funerals. Here you can see it with black vultures.