Wow what luck! I have a possible het pied pastel female that I'm really hoping proves out for me. It will be a few years though. She also doesn't have those neat ringers yours does... and yes I'd gamble that she's a het!
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The ringer is a hatchling pastelyb. The mother pasel het pied ( does not have a ringer, the male pastel het pied neither). That pastel male ( now i know is het pied ) produced a lot of clutches, never seen a ringer.