Kiwi does it when he's comfortable and just about to fall asleep (whenever he's on my lap).
So I guess it means they feel safe, comfortable and relaxed
Edit: yes, Kiwi is a HE, but the most loveable chicken I've ever owned. He's also a silkie
	
		
			
		
		
	
				
			So I guess it means they feel safe, comfortable and relaxed
Edit: yes, Kiwi is a HE, but the most loveable chicken I've ever owned. He's also a silkie
 
	 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
 
		 
 
		 
 
		
 
 
		 
 
		
 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		