Here is a thing I wrote for my site about blood feathers, and a photo..feel free to usethem:
Blood feathers/Pin feathers- When birds are growing new feathers they first come in as what are called “pin feathers”. The new feathers are incased in a hard shell to protect them while growing in (quill). Once these feathers are completely in, the bird will preen them and remove the outer casing. The ones on the backs of their head that can’t be reached can be gently pinched and then flaked off by a trusted human. They must be ready to be preened off, or it will be painful for the bird. You can usually tell they are ready when the tip of the feather is visible and the casing is white.
New feathers are supplied with blood to make them grow. The pin feather is supplied with blood by a vain until it is done growing in. As the feather grows the vein retracts and the quill (sheath) flakes off. If these new feathers are broken by a fall, chewing, bumping them on the cage etc. they can start to bleed. The feather shaft acts almost like a straw allowing the blood to flow out. Birds cannot risk loosing much blood, so it is very important that it is stopped quickly. The most common feathers to have this happen are the flight and tail feathers. The best way to stop the bleeding is to pull the entire feather. This can be accomplished best by holding the bird correctly in a towel, and using a pair of needle nosed pliers or hemostats to firmly grip the bleeding feather closely to the base and pulling it straight out quickly. If the follicle bleeds, apply pressure for one minute with thumb and index finger.
If you are not comfortable doing this, don’t try it. You can try to stop the bleeding temporarily with corn starch or flour and applying pressure. It is recommended that you don’t use styptic powder on birds because if ingested it can harm them. If you can not get the bleeding to stop or if you can’t pull the feather please see a qualified veterinarian immediately. Frequently once a feather is damaged, if not pulled it may bleed again if only slightly bumped.
