MY toes are slightly numb, and when I walk the balls of my feet feel likr there is gravel underneathe them. Whether I'm weather shoes, and I am not a horse or other mammel

How old are you? (This could make a difference, if you are 12 or 82.)

It's good to know that we don't have horses typing their own posts. I'm guessing though that you are probably a mammal, since all humans are.

My guess is that you may have plantars warts, but it could be something else. Either way, you need to go to a doctor to find out for sure.