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Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do horses need to have their hoofs trimmed? How do wild horses hooves not grow out of control and cause them pain? How does the hoof trimming process work with horse shoes?

Basically, I am really curious about the overall horse hoof care and maintenance.
gpt
Wild horses wear down their hooves from walking on hard ground and rocks and things. Every 6-8 weeks, domestic (and some feral/wild) horses get their hooves trimmed to make sure they grow in an appropriate shape that doesn’t destroy the horse’s joints over time.

The farrier would remove the shoe, then proceed normally—trimming the hoof, trimming the frog, filing the hoof, sealing/conditioning the hoof, and applying a new shoe if necessary. Oh and hoof picking first, but everyone does that all the time. 

Anyway, shoes can stop horses’ hooves from wearing out too fast on asphalt, getting stuff in them (sand shoes), or from destroying the horses joints once arthritis, metabolic, or degenerative disorder sets in. It’s very interesting to watch.