Please Help!

[Mar_ducks]

My chickens have become more and more aggressive over the past few weeks. This has resulted in a few of them getting injuries (specifically in their eyes which had caused infection). Why causes a sudden onset of aggression? What can I do to help stop this behavior before more of my chickens continue getting injured and needing treatment.
They always have access to food and water, and they free range all day long.

 

[BoundlessLove]

Hi many chickens do you have and what size is your coop and run?
Also, How many are males and how many are females?
You do not refer to their age; however, it sounds as if they are possibly juveniles.

 

[allosaurusrock]

Agreed- what is your rooster ratio?