This is a good thread. I, like Zack, have the same concerns about using the entire animal. Killing an animal for cosmetic purposes or one that is endangered = not cool. Killing one that is abundant for sustenance and respecting the animal enough to make use of all of it = fine. As far as sustainability goes, I would say the Vie-Long Cachurro 04312 is one of the best options - wood, metal and groomed horse hair. Also, I borrowed one from a friend and I must say it is a fine lather monster with a great balance! Cheap too!