I've got a picky eater too, she's always been that way. Never been food motivated either, which made training lots of fun :wink:
From all the raw I fed her, the $15/lb King Salmon from Whole Foods was her favorite by far. It had been in my freezer for over 6 months so I wasn't going to eat it (I recently cleaned out my freezer so she got to eat what I pulled out), so she got lucky. I doubt she'll ever have such expensive salmon again, but I'll definitely try to get her more affordable salmon. It's pretty soft too, so maybe that would make it easier if there were teeth problems as well. Her second favorite has been ham shank, but that's not raw. I've picked it up a couple times to give her for lunch, and she'll get actual raw for breakfast and dinner (her lunch is usually a smaller meal than the other 2).
I don't know how this fits into the PMR diet, but what if you try starting with meat that doesn't have bone? Then once she eats it and realizes she likes it you can add the bone back in? I usually cut Tiki's food into cubes. I'm sure I don't have to and she'd be able to tear it up herself, but I'd rather spend the time cutting it and be able to feed her in her dish. We haven't been doing much bone so far, so I'm having to find ways to replace what she needs from the bone.
Maybe it's the texture that she isn't sure of? I'm far from an expert, just tossing out ideas