tijkmo,
when it says less documented does that mean that there are in fact examples of prehistoric feathers in existence..i mean in tact, complete, and not just skeletons and/or fossils.
Okay, this is like asking if any dinosaur flesh has been found. It's not a common occurence, because it doesn't normally last that long. It rots. What we have are impressions of the feathers left in rocks. Like this:
Even the bones we find aren't actually the original bones.
"After a long time, the chemicals in the buried animals' bodies underwent a series of changes. As the bone slowly decayed, water infused with minerals seeped into the bone and replaced the chemicals in the bone with rock-like minerals. The process of fossilization involves the dissolving and replacement of the original minerals in the object with other minerals
This process results in a heavy, rock-like copy of the original object - a fossil. The fossil has the same shape as the original object, but is chemically more like a rock!"
Fossilization is extremely rare, circumstances have to be just right. More on that (and the above quote taken from) here:
http://www.enchantedlearning.com/subjects/dinosaurs/dinofossils/Fossilhow.html
So it's not a matter of faith, any more than finding the footprint of a shoe in the mud and wondering if a shoe made it.