Depends on what type of chicken it is.  There are some types where the male and the female have a distinct difference as chicks , like the black sex-link male has a white spot on its head-the female does not. I have had some luck sexing day-old chicks by looking at their wings.  You can only do this to one or two day old chicks. The wing feathers on the pullets are longer than on a cockerel of the same age.  Last year, I picked 13 chicks as pullets...only 2 came up as roosters!  There are several videos on you tube that show this method. Good Luck!
	
		
			
		
		
	
				
			
	
	
	
	
