I have recently gotten two four day old Barred rocks, one Delaware, and one Black Sex Link, both about a week and a half. They are all hens. The Black Sex Link is starting to attack the Delaware for some reason. My sister is starting to worry that it may be a rooster, but my brother says that is the usual behavior for two hens... Which one is it!?!? I have no clue and I need advice! I hope It's not bad! Also, if anyone has any ideas for any fun toys or treats, that would be gladly appreciated! This is my first time having Chickens ever, so if anyone has advice for beginners, that would also be appreciated!