Hi there. Super new to BYC and raising chickens in general. I recently got five little chickies that are now 3 weeks old. 2 sexlinks , 2 Black Austrolorps and 1 Rhode Island. They are in a decent size brooder with all the appropriate things. Recently, the smallest sexlink has started to "pick" on the others. She's plucking out every one's down and has harassed the other sexlink to the point of causing her neck to bleed. I've temporarily sequestered her away from the others but she is miserable. What should I do? Should I just let them be? Will they figure it out on their own? Thanks.