I could attempt some humor by pointing out that my horses are getting a pedicure for Valentine's Day (and no spa day for me), or how excited Angel gets when she sees the farrier's truck. She acts much like a kid (that category includes me) when they hear the ice cream truck. Only a dog could find such joy in what is basically dirty toe nails.
That brings up a third option, the structure of the hoof. The outer layer or horn is made up of much the same material as a fingernail. It too is constantly growing, cracks, chips, and needs routine clipping and filing to keep it healthy. Good hoof care is very important, for no hoof, no horse. This leads to the question if the horse requires so much care how do they ever survive in the wild? The answer to that question could lead to an entire essay on human interference with the natural order of things.
As I pondered these different options over the weekend what came to mind was a excerpt from Dan Millman's book The Peaceful Warrior. Dan must sit in one spot until he comes up with something truly significant. If I attempted that I would never post again. I will just leave you with what he finally realized as he sat there watching and pondering life, "there are no ordinary moments".