This is just something I was thinking about the other day when I was watching my 5 month old SLW cockerel Skunky. My brother stopped by and we went out into the yard. I went in first and Skunky, as he always does, comes running up to me to see what I might have. Then he saw my brother. He immediately when into defensive mode and then did his wing drop, sideways shuffle, hop up round house kung fu leg attack. I got in between them and Skunky would try and get around me to get to my brother. Skunky has turned out to be quite cocky and aggressive toward anything or anyone unknown. He is very good to the girls and I know he will protect them so I will keep him around for awhile unless he gets too bad. Now on to what I was thinking about. How do chickens recognize people and other chickens? Is it by sight, smell, sound, body shape or some kind of chicken radar? I can walk out into the yard and they all know it is me, anyone else walks out into the yard and they immediately know its someone new or at least not me. I dont wear the same clothes or the same color so that changes from day to day. I wash with different soaps so I know I can smell different at times and they still know its me. People can walk out to the yard in the same color and style of cloths as me and not make a sound; they will still know which person is me. Just something I was thinking about.