Thanks for the response! My animals always seem to have rare or obscure diseases. Whenever someone's sick, I usually assume it's extremely deadly and contagious, or it's an illness virtually no one, including vets, have heard of. We bought 8 captive-bred Banggai cardinalfish back in May, and they were perfectly healthy. A week later, a couple seemed off, and I was worried it was Banggai cardinalfish iridovirus (BCIV). Long story short, ever fish was dead by the end of the month and the lab we sent them to confirmed BCIV. It's 100% fatal and extremely contagious. And as you might remember, I had to deal with AGY in my aviary a few years ago. Then my 5 year old chihuahua went into congestive heart failure and had to be put down. Then today I realized Tiki and Ria may have had PDD as well. Well, at least I can say my animals never contract any preventable diseases. None of my critters have had parasites, broken bones, eye infections (well, except for Ria who had an eye thing going on when I adopted her), or any common illnesses. Well, except for the dogs who got kennel cough from coywolves.
There's virtually no information online about polyfolliculitis. Apparently it's thought to be caused by a virus? Dunno. I'm debating whether or not I should pluck all but one feather out of follicles that have multiple (i.e., three or more) pin feathers out of them. I think she just ends up removing them herself anyways.
It's unbelievably difficult trying to dig around in the pockets under her skin to remove all the feathers and muck in them. Like, the feathers are practically disintegrating while you're trying to remove them, and you have to gently scrape around in every nook and cranny in the "muck pockets" to make sure you remove absolutely everything. I felt bad the last time I was removing feathers that were stuck under her skin, because her skin suddenly ripped open while I was trying to tweeze out the feathers. I've removed hundreds of messed up feathers from her using this method, but that was the first time her skin tore like tissue paper. On a good note it opened it up enough the remove four feathers the were hiding in there. Some of the pockets have to be cut open with a razor to get into. Man, Trixie's such a good little girl. She never bites us while we're plucking her.
I'll have to look into some avian aloe gel for Trixie. There's virtually no photos online of the condition, so I guess I should take photos to document it for others. I'll ask the vet about a cream for Trixie the next time I take one of the birds in.
MODERATOR EDIT: ParrotForums wishes to advise that it does NOT endorse the treatment of polyfolliculitis as described in this post. If you believe your bird may have this condition, please consult a Certified Avian Vet.