All 9 of my chicks have been in the same container since a few days old. They are now around 20 days old and my two bantams are starting to fight a LOT. The one is pecking the crap out of the other for no apparent reason. Why? How do I fix this? Does this mean she is a he? They rest are playing here and there but this one seems like a bully. These are my first chicks so I am very new to it all.