Steve for the pics. I am totally 'taken' with your piebald squirrel. What a sight!
Now to Claire... the reason people have asked about her size is because there is just something about the shape of her head and face that gives her the distinctive 'look' of a dwarf. They have a short face and the ears sometimes set low on the head. Claire has the short, rounded face but her ears look normal (for a fox squirrel) to me. Dwarfs are just that .... very small and have many issues due to a genetic 'flaw' although I hate to use that word. In nature they don't survive long so it is unlikely that you would see a true dwarf surviving in a cemetery. With that said, there is definitely something 'odd' about the way she looks. I could pass off the humped back as an injury but the short face and small eyes is definitely different. Personally, I have never seen a squirrel quite like Claire. Is she the same size as the piebald? I know that fox squirrels are typically large, upwards of 2 pounds. That is astounding to me as our squirrels in FL are around 1 pound as adults.
A dwarf should be considerably small than normal. Very odd indeed.
I'm super happy to hear that Claire is a hearty eater. For squirrels that live inside, diet is critical as an improper diet will lead to death from a calcium deficiency (Metabolic Bone Disease). This problem is exacerbated by feeding too many nuts as nuts cause calcium to be leeched from the bones. An outside squirrel is able to balance their diet with natural foods so the concerns about calcium deficiency aren't as great. With that said, I would never provide so many nuts to outside squirrel that they stopped foraging for natural foods and came to depend on handouts of nuts. That wouldn't be healthy.
I don't think that's a problem with Claire. She sounds like a good eater. Your nut butters are fine. You could use the calcium citrate but NOT if it has Vitamin D. Too much Vitamin D is toxic to squirrels. Tums is calcium carbonate and could be used. A tiny pinch of crushed Tums in the nut butter would be good for her. Her humped back concerns me. I wonder what that's all about. If she was a dwarf that could possible explain that but I just don't know.
I'm not sure an outside squirrel would eat any of this but our inside squirrels will eat avocado, sugar snap peas, butternut or acorn squash, and many other veggies. They also like fruit as you have discovered.
Apple, orange, blueberries, grapes, etc. Yeah, squirrels eat better than we do.
You said that Claire doesn't climb much. Can she climb trees at all? You also mentioned that she can run if she's coming for food, right? I wonder where she lives? Squirrels build dreys (nets) in trees to live in.
Edit... I forgot something. Squirrels love to chew remotes, cell phones, computer keys, key fobs, etc.
I'm glad they left enough for you to salvage. Stinkers!!!