This is one of my black star pullets, she and one of her flock mates has this issue. I have given her a good look over and no wound, or even a bald spot that's noticeable. Is this a normal part of the young chicken molt? She has lost all of her tall tail feathers. I have also not noticed anyone picking on her. 
They are about 14 or 15 weeks now.
		
 
	
	
		
			
		
		
	
				
			They are about 14 or 15 weeks now.
 
	 
 
		 
			
		
		
		
	
	
			
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		