Help! Chickens Pecking Each Other, Drawing Blood and Infections!!!!

[dawg53]

Everything looks good; plenty of space in the pen and coop, feed etc...also ensure they have fresh water to drink at all times.
If they continue picking and pecking each other, you know where to order the Pinless Peepers.

 

[Yardmom]

Food and space looks good from what I can tell. That means the why is still unknown.
Is there a hen that doesn't seem to be on the receiving end of the picking? Wondering if you have a true bully and her copycat friends.