"Dinking" is a term for breeding an unproven morph in hopes that their offpsring will carry on a certain trait. The mom in this project had already been bred to random males and none of her offspring inherited her pattern. This time she was bred to her own son to see if her appearance is due to a recessive trait (like an albino, for example). This year again none of her babies carried on her look so further breeding would be necessary to continue to try to prove her appearance to be genetically inheritable.