Put the powder in a small amount of baby food, then mix well, then syringe feed, she won't spit it out. I found wrapping them up in a towel so that only the head is out works well. You just plop them on their back on your lap, open the beak and give them a small amount of the concoction at s time. If you make the stuff the consistency of a thicker paste, then just take small, pea size amounts and put it near the back of their mouth.
Don't feel weird getting baby food for the animals, I've been doing it for the past 12 yrs that we've owned rats. My youngest was 6 when we first started keeping them. We still buy baby food and formula for them so we have it on hand when they get older or are not feeling good. Nobody questions a thing.