I treat it, but it keeps popping up. I'm thinking I'm going to try Ivermectin soon because Vaseline isn't doing anything. One mutt with feathered legs has almost no scales left despite being treated as soon as I noticed and then multiple times since then. Sigh. It's hard to notice, too, because it's so slow-spreading. I don't handle the average flock member that much and it's invisible from viewing a few feet away.
Aw, sorry to hear that! I hope the Ivermectin works for you if you do go that route!