White crust around beak-not eating- separate from flock - feather loss under beak on neck

[dgh]

White crust/paste around opening of beak(not at feather line)-not eating- separate from flock - feather loss under beak on neck

3 year Americauna in flock of 35

Fed poulon layer pellet, cracked corn and sunflower seeds. Free range 3 day out of 7.

I have given orally, ivemectin 7 drops


what is it and what should I do?

 

[CMV]

Can you get us some pics?