The horse's hoof has an infection. Do not ride the horse but call your farrier.
If you mean the part of the hoof taken off by a farrier then it's usually just called a hoof trimming.
you use the hoof pick to pick the debris out of the hoof and you can rinse the horses hoof out with the hose.
No
The answer will depend on what you mean by 'Dots'. If you mean the tiny dark dots that are on the coronet band of some horses those are called Ermine. Spots on the hoof itself are either just a 'marking' caused by the color of the skin at the coronet band or possibly a 'hoof brand'. Some people will have a farrier imprint a pattern or series of numbers on a horses hoof to help prevent theft and identify horses that may look identical.
A graze just above a horses hoof.
well a horses hoof is the same as our toe nail
The size of the nail depends on the horses hoof size.
This is the hoof wall. This is the hardest part of the hoof and it supports the horses weight.
If mud or manure gets trapped in the contours of a horses hoof, it can start to rot and in turn eat away at the hoof's tissue causing many problems.
Hoof
I think you mean horseshoes, which are made out of metal and are nailed into the hoof, It doesn't hurt the horse, because the hoof is made of keratinethat Horses that are kept barefoot are sometimes fitted for hoof boots
well it meens that it cuold have a decay and to just check it at the vet