Sue: I take it these were the dry and
hard type (they can be soft and moist). Corns are bruises in the seat of
corn area (between the bar and wall), usually cause by poor shoeing and /or
trimming or deviations of
the bones in the leg predisposing the horse to
the condition (or could be
under-run or crushed
heels)..
Trick is.. you have to decide what caused them
in the first place to know the odds for the future.
IMO, Barefoot is best for re-hab , with frequent attention.
And yes,
about 6 months is what it'll take to completely grow out if the
damage
is deep.
If he's got to be shod for winter, try a rim pad instead of a
snowball