Ridecamp: [RC] barefoot & easy boots

Would like to get some input on this subject.
I have two horses presently going barefoot; one six and one two.
The six y.o. has been ridden barefoot for three years now, and aside from
loose gravel he seems to do fine. Should I use easy boots on just the fronts
to start, or go ahead and boot all four?
Thanks,
Tracy

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