How did horses hooves change over time?

Well, this question definitely depends on whether you believe that horses changed at all, which you probably do if you are asking this question!

This is a hard question to answer, because there is no hard proof on either sides of opinion.

Some people, like myself, believe that a God created everything just how it is now.

Others believe that everything has evolved from tiny cells that were on the earth millions of years ago.

So if there was an answer to your question, it would just be someone's own beliefs and opinion, and so there is not really any right or wrong answer for this question.