I would think since they are basically bone, rather than a keratin based solid, it may not work as well, if at all. I have never boiled them to straighten, but i have boiled skulls to do euro mounts on deer, and moose, and on the deer, found zero softening of the antler after long boil and soak times. I have however seen bone crack from boiling. It may be worth a try, but from the somewhat related experience i have i dont think it will work, or at least not well enough to justify the effort. Others may have more experience on this and be able to chime in also.