20%grower would be good, black oil sunflower seeds are fine as a treat. You can give salmon, that's ok.Yes they were living in a greenhouse with two roosters. They have an orchard now to themself. I was giving black oil sunflower and 20 grower and when they started laying again i give them layer pellets now. They stop laying last week. I can give tuna, what about salmon? The orchard is dry so i scatter food for them to eat so they dont fight. I also give barley at night if its windy.
They should all be about a year an a half, so about to have first molt. My other regular birds are molting hard, same age, but these girls seems not yet. Orchard is big and they explore and things. Maybe just one mean bird? We already had to take out one and gve to the rooster because she would grab the others feathers and hold even when they try to run away! Maybe there is another like her i havent found yet. I will take out the naked ones and maybe the mean one will be left obvious. They have no lice mites i check often especially with rescues
If you have warm weather she should be ok outside separated from the others. Keep watch on the wound that flies do not get on it, the flies can lay eggs on a wound, then you would have maggots.
Keep us posted on her progress.