Takes a tremendous amount of work to get a hide worth having... I'd have to find my old research on it but the brains in each animal if used properly was sufficient to cure the hide. Second is a major about of scraping and beating the hide out faithfully each and every day! The cheating way to do this is a few small blocks of firewood and a dryer that no longer heats jus spins and then finish what it missed. There's a few it's an bits I've figured out but I have to get scratching to remember.