From what you've told, it sounds like there is some problem there, but also could be more that you're not used to seeing hoof walls nice & short &/or because she's impacting toe first(probably), she's not wearing down the rest of her foot enough, so the toe looks extra low. Her outer soles *should* be weightbearing, not held off the ground, but her heels/frogs should be doing the most, rather than her toes.
So I'd guess she probably has sensitive heels - that she's kept locked up full time will also be part of it, as she isn't getting adequate movement either, to build their strength.
She may also have flat/thin soles, so there is little protection under P3. 'If you don't use it you lose it' clause is relevant to horse's hooves, as with the callouses on a worker's hands. If she's already tender from what she's had to do bare, hopefully this is just minor bruising, rather than abscesses or such. If there's not enough skin to protect them, then you need to boot her or such, to prevent further damage.
Padding/protecting her heels should allow her to use them correctly & therefore begin building their strength. Just as yourself at the end of winter & constantly wearing shoes, you wouldn't just go out on your soft feet for a few km walk on gravel, but if you build up to it gradually, you may produce enough callous to run 10kms bare by summer. If however, you only went out bare for a few minutes daily, this probably wouldn't be enough to 'condition' you for that surface(not to mention being unfit for 10kms...) Therefore the more turnout the better. Aside from this, horses are built for free movement & for a number of reasons keeping them cooped up is not healthy for them. 24/7 turnout with free access to shelter would be ideal generally.
Tho the pic is blurry, it appears there may be lami rings on that hoof too, about half way down. This could be part of the problem too, which may be(usually tends to be) diet related. Unfortuantely can't tell much from those pics otherwise, but if you would like a hoof critique, see the link in my signature for info on taking good pics.... & the other one to learn more. I personally wouldn't advise putting any topical goop on them either, and I don't think that either hardener or softener is a good idea - hooves SHOULD be hard but topical potions tend to make them brittle too.