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They wore down on rough terrain
When they're roaming around freely, hooves get worn down steadily over time. And if there was some kind of problem... well, they just died.
Think of your dress shoes and how they look after a few walks from the parking lot
but then why do they now need help cutting their hooves if walking is enough yk?
Grass and dirt don’t wear them out
ok so dumb question, they weren’t originally in grass and dirt? where were they where it would wear them out
I guess rough dirt and terrain to file them down but the ones that are domesticated don’t walk around enough.