Here's how it works:
1. Parentage: A pinto horse is born when at least one of its parents carries the genes for pinto coat patterns. These patterns are determined by the distribution of white and colored areas on the horse's coat.
2. Inheritance: The specific pinto pattern a foal inherits depends on the genes passed down from both parents. There are several different pinto patterns (like overo, tobiano, and frame), and the combinations of genes from each parent determine the foal's coat.
3. Birth: The actual birth process for a pinto foal is no different from any other horse. The mare carries the foal for about 11 months, and then gives birth to a live foal.
So, while a pinto horse is born through a normal birthing process, its unique coat pattern is determined by its genetic inheritance from its parents.