My rooster has been sick for a week now. It started mainly with him just not acting right. Standing away from the girls, head and tail down. I brought him in and cared for him inside. I've started Tylan and I've wormed him. He's just getting worse. Now he's sleeping all the time unless I wake him. He will accept water if I hold it up to his beak. Today while checking him over I noticed that the back of his neck looks odd. It's scaly and he has a hard lump. He's been dusted with DE. Is this mites?