I’ve had two chicks like that. There was something internal where the nutrition just wasn’t getting absorbed. 
one died at 4 weeks and one at 2 weeks. They had to be put down because it was clear they were starving to death regardless of how much they ate.
	
		
			
		
		
	
				
			one died at 4 weeks and one at 2 weeks. They had to be put down because it was clear they were starving to death regardless of how much they ate.
	
 Best of luck
