He legs look very thin.... what are you feeding her again? Feathers are ruffly and DIRTY. Do you have clean water for her?? Put a big huge tub she can step in of clean water (storage tub or baby pool go get one from
Wal-Mart) and let her take a BATH. She's probably miserable. Geese don't like to be dirty. She needs deep drinking tub to dip her head completely under water to clean eyes/nose/etc. We use clear storage tub. Clean it atleast 2 times a day with fresh clear water. Geese are not like other FARM ANIMALS... they are WATERfowl and need FRESH CLEAN WATER to bathe and dunk their heads/eyes to clean their eyes and sinuses/nose out with like 10000 times a day they do this. She will get real sick if you are not providing these basics.
GRIT -- -SAND??? Geese prefer SAND over GRIT. They need it to grind up all the crap they eat free ranging. Get some sand (clean be sure it is CLEAN CLEAN CLEAN sand) and put in there for her. If you have to go to landscape company or anywhere just get some - beware the bag stuff from Home depot - it has moisture and moldy crap in it.
Just go and get a BUCKET of it and pile it in her pen or where she can find it. We use mortar sand from a landscape company - it is clean, chemical free and we just go get a bucket of it at the landscape yard for $5 --- they eat it up!
If no sand ---- chick grit is small and fine enough to help. Sprinkle a little in her food like you would put pepper or salt - not a lot -- less is more just needs SOME.
See if that helps --- I'd do it like asap and if she eats/takes it then she needs it.
Otherwise find an avian vet and get her in there Sunday (tomorrow) asap. or Monday if she makes it until then -- know what I'm saying??!