I guess my question would be "why"....would anyone want to use problematic fibers. We know that sheep, goat, alpaca, llama, rabbit, camel, and a few other critters are proven and have been used for thousands of years. I'm a sheep wool addict, myself.
My spinner friend will spin a yarn from odd wools, just to try it, but usually only once. He then goes back to the proven fibers.