Ralph Davis said he proved them genetic, but not much has been done with them. Some breeders in Europe think that they have something to do with Piebalds, and here in the US some breeders see Ringers happen more with Hets for Piebalds. I have asked as many top ball breeders as I can, and they all say Hold on to them, You don't see many for sale. I have a pair in my collection, and until they say for sure I am holding on to them. At one time they thought Piebalds where just a genetic fluke, and then they found out otherwise.Here is a pic of one of my Ringers, also there seems to be different kinds of ringers, Bullseyes, ect. ect. Good luck..

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