I have a 4mo silkie rooster who is DEFINITELY male. The rooster who's a month younger has already started crowing and becoming interested in the girls. 
My other silkie roosters (they are gone now) crowed at 15-20 weeks.
Ginger has NO INTEREST in anything "rooster".
He doesn't crow or have any interest in the girls. He doesn't stand or act like a roo at all.
My younger boy is leaving in a week so I'll see if Ginger crows after that.
Ging has a few "issues" (they don't really stand in the way of his life at all). He's partly blind and he walks with his legs further apart.
I've attached some pics:
	
		
			
		
		
	
				
			My other silkie roosters (they are gone now) crowed at 15-20 weeks.
Ginger has NO INTEREST in anything "rooster".
He doesn't crow or have any interest in the girls. He doesn't stand or act like a roo at all.
My younger boy is leaving in a week so I'll see if Ginger crows after that.
Ging has a few "issues" (they don't really stand in the way of his life at all). He's partly blind and he walks with his legs further apart.
I've attached some pics:
 
	 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
			 
			 
			 
 
		 
 
		 
 
		 (I know you said he’s definitely a roo just had to say it!)
 (I know you said he’s definitely a roo just had to say it!) 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		