Snowflake question

When a baby snowflakes after quilling, are the white quills even throughout or can they be heavier in some places? My girl will be 9 wks tomorrow. She is still quilling some. Most of the new quills are white coming in but they seem to be more heavily white in some places then others. I don't think they are pinto spots though because the skin isn't pink under them.

Thanks.
Stephanie