Quote Originally Posted by bcr229 View Post
What morph is she? Both black pastel and cinnamon morphs have a defect called "duck billing" in the super form that is tied to the morph. In single gene critters this can show up as a whistle. I have several black pastel combos that do it, but usually just when under stress or when being handled, not when they're at rest.
She seems more like a cinnamon as her color is and markings are similar to that but markings are both. She only whistles when handling, eating, or over exerting herself exploring.