I have four chickens. Two are seven months old and two are five months old. The younger ones, a Buff Orpington and a White Crested Black Polish, grew up together and were introduced to the other 2 (a Barred Rock and a Buff Brahma) at the same time. There was the normal pecking order to show that the Barred Rock was in charge going on for a while, but things settled down. Now for the past week, my little Polish hen (Wiz) has been pecking at her buddy Sunny (the Buff Orpington). Sunny is twice as big as Wiz and I'm wondering if this is unusual behavior? The little gal going after the big gal? Wiz sort of head butt's Sunny from behind and then pecks her feathers... even sort of flies up to try and attack her from above. Really weird. Is it maybe just a space issue? We're in the midst of getting a much larger coop and run for them, but it won't be ready for another 2 weeks. They used to be such good pals following each other around, but now Sunny hangs out with the other 2 and little Wiz kind of does her own thing. Any suggestions?