There really is no way to tell if an snake is a het or not without the paper work and seeing the parents. I have a spider het pied. Many people say het pieds will have certain marks on the ventrical scales, but this is not the fact with my spider. His dam was a spider pied and his father was a regular pied, so I know for sure that my spider is 100% het pied but there is no visually way to tell that.