A crack in the frog of a horse foot is pretty normal. Nothing to work much about unless the horse is lame in which case a vet and /or farrier should be consulted.
no you take torch and burn a hole right at the top of the crack
The frog is the section in the center of the hoof that is triangular and soft, it also pumps blood up hoof to the leg.
No It is a soft, tender part like skin. It may cause a small stone bruse if you try to pick it out.
the whole hoof isn't called the frog its just the triangle in the middle