I have a chicken bone recipe...easy to make...
Take cup of flour and add chicken stock until you have a 'biscuit' like dough.
Let stand for a few minutes...then roll into logs...put on a cookie sheet and bake for about 15 minutes @ 350 to 400 degrees...

cool and leave out until they get hard...put them in the freezer until you need...one of my dogs loves them right out the freezer when its hot outside...

I haven't made them in awhile...glad you started this thread.
.