African grey's wing feathers in poor shape
I've had my African grey for 7 and a half years already, and I have no idea how old he actually is. We love each other and he trusts me a lot... He has a gigantic cage, the whole house to destroy and I feed him seeds, fruits, veggies and grains (with occasionally a piece of egg or meat or cheese).
However a few months ago I noticed a problem with his wings. The tip of the tallest feather (left wing) was broken and twisted. I thought he might have hurt himself while trying to fly (he's not clipped but he lived for a long time in an extremely small cage with his previous owners, and doesn't know how to fly). But every day it was a new feather looking twisted and now, both wings have feathers cut in half and twisted, or even completely missing... They don't look good at all...
I also noticed a tiny red feather on the back of his neck, and now I'm extremely worried. My other parrot is perfectly all right, though (and they live in separate cages so he can't have hurt him...)
What's wrong with him?? Should I take him to a vet? Could he be plucking himself? He hasn't done that in years... Only his wings are like this, the rest of his body is perfect. Could it be a disease? Malnutrition?
He's not comfortable around strangers and I'm very reluctant at the idea of taking him to a vet, it'll stress him a lot.