I had two peachicks die from Blackhead. I confirmed this by examining the liver of one. The graphic pics are on the peafowl thread. I was very careful (I thought) to not expose them to any of my chickens, yet they got sick anyway. I built them a new coop, with several inches of clean sand on the floor, covered in shavings. Apparently I tracked something in. I am treating them with Metronidazole and they are responding well. I am wondering about my adult pair of Royal Palms. They look fine and I don't see any symptoms that they are sick. They don't look droopy or sleepy like peachicks did. There are no yellow droppings. Should I treat them anyway, or should I just keep an eye on them? Could they possibly be immune?