This evening, after putting my two 10 week old pullets to bed in their cage in the hen house, I let my two older hens (2 years old) out of the chicken run into a low fenced in area to "free range" a little before their bed time. I was sitting and waiting for the girls to get tired of pecking at the grass and go to bed when I noticed Roxy, my Austrolorp, eating the poo of Pebbles, my Wyandote. This was the first time that I witnessed this behavior from either of the girls. I intervened by scooping up the rather large poo pellet and disposed of it in the trash. Unfortunately I think she ate about half of it before I noticed what she was doing. I am now wondering if the reason that I do not see much poo in the chicken run is because Roxy has been eating it. Is this normal behavior? Can I break her of it? Why would she do this? I don't think it is a healthy habit for her to have.