14 week old hen is making a sound every few minutes. She’s active and no other signs of anything. I put DURVET Oregano in their water. When do I know if it’s respiratory and give antibiotics? I have Tylan 200 injectable and saw the post that said it can be given orally. When do I do that. Ugh 
 help! 
	
		
	
	
		
			
		
		
	
				
			
			
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