Say 1500 hundred horses at Belmont, five nails a shoe (20 an animal) most shod every thirty days! Too many too count!
Once saw a very pricy AP Indy firster come back with one solidly imbedded in his left eye in Louisville.
Fairgrounds and Churchill have magnet machines, not sure of NYRA, though a friend that sells the machine could not get by gatekeepers some six years ago.
Hoofs similar to a fingernail, sans exposure to weather, wetness, stall ammonia thru urine and defecation then combined with extreme stress.
Very sorry for the wonderful Divine Park filly. bbb