Mystery Gosling ID- Sebastopol?

[MyGooseGrayson]

Hi! I have a delightful mystery goose, just over 3 weeks old. We call her Gracie (although actual sex is unknown). I was wondering if there’s anyone who might be able to take a guess as to what breed she may be! I’ve started seeing little curly feathers coming in on her tail and sides, and that got me wondering if she could be a Sebastopol or a cross.
Photos loaded in a weird order but they are from weeks 1-3, plus her curly bum.
Also if anyone has a guess on goose vs. gander, I’d love to hear it!

 

[Goosebaby]

She looks like she might end up being buff colored

 

[MyGooseGrayson]

So my lovely goose is now 10 weeks old, and my curly goose suspicions are VERY strong now. Her back feathers are all floopy! Could she be a cross? Is this just a normal stage of goose feather development?

 

[AGeese]

She looks like mine with the grey tips. Mine is supposedly an Embden, but I initially thought maybe there were some Dewlap Toulouse in her back ground.

 

[Percheron chick]

Definitely a cross with Sebastopol.

 

[MyGooseGrayson]

I am now almost positive there’s curly in here