Keep a close eye on her, see if there are any changes in her wanting / not wanting to weight-bear.
If it's any consolation... our Geraldine has recurring "poorly foot" - as in, she gets a stone in, treads on a stick, has a sore bit of hoof (because she absolutely will not have her hooves trimmed!) or gets over-excited tormenting the billy goat,
she lifts up the offending front foot, looks sorry for herself (owt for the sympathy vote!) kneels down to eat, nad gets extra treats!
She isn't keen on us checking what it actually is each time (see hoof trimming comment) so we just have to supervise & hope it gets better... which it does.
crunching sounds more worrying though :/
hope she does just recover from whatever it is