I haven't read the whole thread...
Food: fried hamburgers, chicken roasted, turkey roast (if that doesn't work, fry in butter), chicken and/or hamburgers in shake & bake in the oven, liver, kidney, beef heart, dehyrated meat, beef hot dogs. Many times I have to prime Tony with dog biscuits.
Re the teeth: she has to be good weight and healthy for a dental. Depends on the vet. My vet has done Magic at 15 1/2 and Princess at 13 1/2 with no problems.