I found this from another forum about Chicken Feet...Don't know if it'll help...
when I bought the chicken feet the guy selling them said, "Oh they are great if you boil them.." and I said "Oh these aren't for me, they are for my dogs!" LOL But when I got home and looked up chicken feet on google it came up with a recipe for some chinese dish with chicken feet in it!!
I couldn't see it causing any issues at all.
Then, there's this page...look under "Where can I buy this stuff"
http://www.rawlearning.com/rawfaq.html
Here's another...
http://www.dogster.com/forums/Raw_Fo.../thread/448565