I've had a pullet severely injured, skin pulled oof the side of her neck , showing her muscles, crop, and and internal organs underneath between muscles. after the initial panic trying to figure out what to put on it that she or the other birds won't peck at, and finally came to a brilliant idea. I ran in the house and grabbed my jar my Redmond pure clay poultice I keep in the drug cupboard. If a mother can pack her son punctured eye with it and leave it there until it fell off on its own, surely this should work on my chicken.
I packed really thick the gaping hole all along the length of its neck,and released it to roam around with the others, and the nieghbor who found her in the first place, would catcher her every day, so i could check to see if the poultice needed to be reapplied here and there where it caked off, and pack some more right over the first application. After a week or so,t he chicken started acting normal again and was running around with the rest of them, and gradually the dried up poultice fell off little by little. When we culled that bird, it had a hard little hard lump of clay in her neck, but otherwise was healed and healthy until culling time. So pure clay poultice thickly applied, the pure clay has the consistency of a gel when mixed with water. Reapply when necessary to keep the whole injured area covered in pure clay, to give it the skin protection it needs until it grows its own skin underneath. Hope that helps.