I just remembered when i read that thing about a poodle above, a friend told me of an angler who asked one dog owner to brush his dog in front of him, so he could get its hair for tying flies. The owner did it and the guy walked home with his palms full of desired hair. I guess a nice word can go far
When i was a kid it was hard to get fly tying materials so my father, his friends and of course i, would go rooster hunting, driving around countryside, looking for good roosters and when you would spot one you would ask a farmed if he would sell it. The farmer killed it and normally kept the meat and we would get the scalp which would be processed much like it was described by BobP above. And i still have a feeling that flies made of those "organic" roosters have better catching rate than those made of those fancy scalps which we can easily buy today. I just might do some rooster hunting this winter.
BlueOne