Oh jstrelaxin, I am so sorry to hear about that, I read your conversation with CD, its something I have never heard of before. Roxy sometimes puts her claws in her mouth, but never chews them.
Is it possible that something might be irretating your bird's feet. I am not sure if it is safe, but try to put your birdie's feet in luke warm sterlized water and maby get some kind of moisturisor on the bird's feet.
Hope something works, but you and your bird are in my thoughts.
:unsure: