lately there has been about 1000000 black flies flying around my chickens and when i picked one of the chickens up and killed some of the flies i noticed that they were sucking my chickens blood and making there waddles scab over and look horrible 
what are they and what to do
	
		
			
		
		
	
				
			what are they and what to do
 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		