As Kili's flight feathers were growing in for her first molt, on one side they managed to all come in fine but on the other they'd break off one at a time as each would come in. Without the previous feathers for protection, new feathers would continue to break.
So one day after doing some tricks with Kili I noticed something red on my finger and under closer observation realized it was blood. With thinking about it I washed it off but realized that I had not cut myself and I wasn't bleeding! I just had a hunch so I went to check the bird. I held her in one hand and opened the wing with the other and indeed a blood feather (primary) had snapped across the quill when she crashed into something or fell and it was bleeding.
I rushed to apply quick stop to it to stop the bleeding and with an opening that big it takes a while and a lot of powder. Unfortunately the situation got a bit messy and created a new problem. I noticed one of her eyes half shut and red looking. Apparently in the frenzy to get powder on the bleeding wing, some of it spilled into her eye. I grabbed one of my squirt bottles and squirted a water stream into her eye to clear it out. After about 10 minutes the redness subsided and she looked fine.
To make matters just the slightest bit worse, that day I had cleaned and completely rearranged her cage. And that was barely an hour before so she was not yet used to the layout and the following day I would be away all day. Furthermore, the feather wasn't fully broken at the quill but rather dangling. I feared she could get it caught and get further hurt or bleeding start again if it broke more. I got out a pair of scissors and was going to cut the quill above where the bleeding stopped so the feather wouldn't dangle but I kind of have a phobia about cutting feathers. So I was taking forever and she was being squeamish which made it harder for me. I would make an attempt and she would jerk just as I was about to cut so it would delay things further. On one attempt she somehow jerked when I prepared to cut and the feather broke on its own at the place it initially cracked. What a relief. I applied a little more quickstop to it in case it would bring back the bleeding.
This was right before bird bed time so I put her right to bed. I was nervous all night about the bleeding and feared finding a dead bird in the morning but she was fine and I went on my trip. Luckily, because the bleeding stopped and feather removed I was able to worry a bit less during my trip. I felt bad about changing her cage in this condition but that was before it happened. I went away for a day or two and when I came back she was fine and thrilled to see me.