He's cute. However, there really aren't any "markers" for a specific het. Unless you buy an animal from a reputable person as a known het, you have no way of knowing if it is or isn't.

I've seen many many normals and other morphs with the het pied tracks on their bellies. And only one of my het pieds has some small ones, the other doesn't. All the so called markers are is best guess, nothing more.

If you bought him as a het pied, or even as a possible het, you can try to prove him out. otherwise it's just wishful thinking my dear.

Gale