I think I'll buy a humidifier this week.
My Timneh has always been an agressive preener. When his
baldness levels change, it's always gradual and the change is
usually very small. It's not sudden and a significant change
like the severe's.
I would be willing to cooperatively experiment on the Timneh, to
try to solve the plucking, but not the severe. I hope they're
not plucking because of different problems. I don't want to
uncollar the severe because I've come home too many times to find
a ***ly-plucking half-bald macaw that I have to rush to the
vet. I don't want to use mental ***, either. I'll see what
the humidifier does.
I've had the Timneh for ten years so I've tried a few things. ;)
Examples of things that didn't work: bitter spray (Ralph laughed
at this, and it made him sticky); mixing non-food items, such as
wood shavings, into his food so he'd have to "forage"; changing
daily routines and attention towards him; changing diets; BIG
assortment of toys; food-dispensing toys. He stopped plucking (I
call it "plucking" because it's easier to type than "aggressively
preening") for a while when we brought Sidney (the macaw) home,
but started again a few months later.
a) take the bird to the best avian vet you can find for a health
workup, maybe it has some physical problem
b) read the book "My Parrot, My Friend", which talks about this
problem in detail, with case histories
c) see if you can find an avian behavior consultant who can
come to your house and see the bird and the situation.
What I'm trying to say is, there may not be a quick fix. You
probably knew that already....
Indianapolis, Indiana, central USA