Is its rabicano? I think if she was pinto pattern, and I might be wrong, but she would have been born with that. The pinto pattern is a result of pigmentation causing the hair to grow out in different colors. The rabicano is roaning that appears within the first few years and is on select areas of the body not the entire body. So, as I understand it (please correct me if I am wrong) the foal is a chestnut with rabicano pattern. This is a pattern that is found with some regularity in standardbreds.