Yiu can try making a new thread and address questions about feathers, it might lead to more responses.
Are there other pets in the house?
If you can offer more ways fir him to choose, that might be part of his issues with stress. Link together perch areas so he can move himself. The below is from Pamela Clark, a very renowned parrot behaviorist.
Below from Pamela Clark
" Control is a Biological Need
We know that all animals exercise control by making choices. I have argued for years that by increasing the number of choices that our parrots are able to make, we are increasing their quality of life.
Lauren A. Leotti and her co-authors expand upon this idea by saying, “Belief in one’s ability to exert control over the environment and to produce desired results is essential for an individual’s well-being. It has been repeatedly argued that the perception of control is not only desirable, but it is likely a psychological and biological necessity.” They go on to state that “the restriction of choice is aversive.” (Leotti, 2010)
Lack of Control is Aversive
Not only is it aversive, it can result in the condition of learned helplessness. This is a state of behavior in which the animal stops even trying to make choices. How many times have we described a parrot as a “perch potato?” The perch potato is manifesting a version of learned helplessness.
Expanding upon this idea, they write: “In the absence of other stressors, however, the removal of choice, in and of itself, can be very stressful. It has been found that the restriction of behaviors, particularly behaviors that are highly valued by a species, contributes to behavioral and physiological manifestations of stress. It seems that the aversive effects of captivity may depend upon the extent to which behavioral choices have been reduced relative to what could be performed in the natural environment.” (Leotti, 2010)
New Perceptions
In the past few years, I have come to see our parrot-keeping practices in a new light. We have taken flighted spirits, clipped their wings, and put them in cages. Many parrots spend all of their time in their cage, or have at most, one or two hours out each day. We have taken away their liberty, which is essential for exercising choice.
If we kept dogs in a similar manner, rendering them unable to move in a way natural to them and keeping them in kennels for 22 hours every day, it would be considered abuse. However, these practices are still commonplace in the parrot world, rarely being brought into question. We appear unable to judge the inappropriateness of these practices since they have been accepted as normal for so long."
https://blogpamelaclarkonline.com/tag/parrots-and-flight/