Buff Orpington growing in weird tail feathers, thinking she might be a mutt

[Ihavesomechickens]

My buff Orpington pullet started growing in these weird feathers today. The are currently only growing in her tail and around her vent, but I am wondering if the will spread. Does anyone know what cross she would be? I got her from a feed store so I have no idea what her parents look like. She is 11 weeks old Wednesday.

 

[swamphiker]

My hatchery quality buff orpington has similar looking tail feathers to yours. This is likely because the hatcheries breeding for feed stores are focused on producing chickens for egg/meat production rather than selecting for breed standards.