I've always admired the Gouldians, so I went for it. I figure, if I don't care for keeping finches, I can just sell them after a while.
So since then I've been tring to do a lot of research on finches, and I'm starting to get attached to the little guys.
BUT, there are some problems. The man was selling them because they were his wife's, and she died. He's not into birds himself. He hasn't been taking too great of care of them since she died (understandably), and she probably wasn't feeling all that up to caring for them before that. She had a heart problem.
So their cage was horribly filthy, but I figured I could clean that up. What I didn't think about was that the birds themselves might be unwell. They looked OK there, and for the first few days here. But now I'm noticing bare patches on the backs of the societies, and the female Gouldian is sleeping way too much. WAY too much.
Here are some photos of the societies. I hope the bare part is clear enough. I can hardly see it, and I already know what I'm looking at. The down isn't missing, so it's not bald to the skin. It looks like grey patches.
I've tried searching all over the internet for anything like this, but mostly I keep getting stuff about bald heads and necks. I'm hoping someone on here will recognize what causes this, and how to treat it.
Ideas that have ocurred to me are: Mites or lice? Lack of nutrition? Plucking from stress or behavioral problems? Dry skin or dirty feathers due to lack of bathing? (I was afraid they would catch a chill, so I haven't given them any baths, but then I learned that they NEED baths- so maybe I caused this?)
As for the female Gouldian, I've put a heat lamp over the cage for her, but she stays away from that area. At least it must be helping with the overall temp in the cage.
She's not noticeably fluffed up. There are no other symptoms. No sneezing, discharge or any other respiratory signs. Her eyes, when she opens them, look good. I can't tell about her droppings, because I have no clue what a finch dropping is supposed to look like normally. So far it has all been off-white chalky looking little balls. Nothing at all like budgie poop. Today there were a few that actually looked like they had a separate solid and separate liquid part. But I don't know if that means they are turning bad, or if they have been bad all along and they are turning good.
So if anyone can describe good finch poop to me, I would love it!

I feel bad if I have over-stressed them due to transitioning them poorly. On the other hand, I hope they don't have some serious illness.
I would appreciate any advice or suggestions about what I should be doing better with them.