You could try putting the mean one in "solitaire"  a crate, or fenced area just for her,  for a few days to get her out of the flock.   When she is put back in, she may be lower on the pecking order.
 
But, if she causes bloodshed, I would either rehome her, or let her swim with some noodles in the soup pot. Easy for me to say because she isn't mine.
	
		
			
		
		
	
				
			But, if she causes bloodshed, I would either rehome her, or let her swim with some noodles in the soup pot. Easy for me to say because she isn't mine.
 
	 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		