The very best advice and information I have found to work in food aggression is to let the dog feel un threatened around food. Throw goodies in their dish while walking by. Brush gently past them as if it was a mistake. It takes a while but it does work......TRUST ME...........
With Raw hides, bones, etc.....sometimes they will never get over protecting them but you can do some switch exercises. Try to exchange the item with something better.
Some dogs may never get over these issues and fighting on a daily basis with them is going to make it worst. Work to make it better and safer and just manage the issues to make everyone safe.
Edited to say groupieindenial had a question there but it is now gone.........Didn't want too look like I was talking to myself..........
