Every chickens are locked to certain direction in each waves, and you know if Coward Chicken always shoots the same direction as its bottom. It means, if the chickens are designed to be facing the player, you will have really bad time (poop rain). While in some waves which they don’t face you, they will shoot to nowhere and don’t give any threat to the player.
So, I propose to make coward chicken have more “cowardice” attributes. They will always try to avert their head from the player, so the bottom will always face you (but I don’t think it should always precise at shooting, or it would be too predictable). It would give more consistency in shooting, and giving more challenge to the game.