I have noticed that mine are really unbalanced when molting. Just yesterday two of them fell off nearly 6 feet high - Brune trying to get in the nest box and then in the evening Cannelle trying to hop over Nougat to go roost. I think (maybe I'm wrong, I've never read anything about this) that just a few wing feathers missing is enough to create unbalance when they need their wings to stabilize or for momentum.
And it may also be due to age, I definitely notice mine are not as mobile as when they were under two years old.
*********
I was quite impressed with the poem and the video of hen fights. My six ex-batts that arrived here together never had this kind of fights, until last year when I brought in "strangers' (Théo and Chipie) which they bullied badly, but it was never fights between equals. However, I notice my younger chickens, Chipie's hatch, "play" at fighting like this all the time. It doesn't seem serious but more like to establish a pecking order. Gastounet takes part in it, and so does Chipie (who dominates them). So, I wonder why there are fights between some hens/ chickens, and not others ? Is it a natural behaviour, that my ex-batts didn't have growing their first three months in a battery ? Or is just individual temperament ? Or maybe group dynamics, as for humans ?
If I have the time tonight I will definitely read the follow up on the fight between Hattie and Aurora.
Right now my rooster Théo is bullying my cockerel Gastounet. There is no actual fighting because Gastounet is terrorized and runs like mad on his long yellow legs. I refrain myself from intervening, but I sometimes loose my temper and shout at Théo

.