Have you tried feeding sadie by hand? When Vash got his Upper Respitarory Infection he was unable to smell the food, so when I put it in his bowl he was unintrested and just walked away. However if I hand fed him is food he would eat every last bite.
Afterwards I started using items that had a very strong smell to intice him into eating his kibble from his bowl, for example I dipped a few peices of kibble in peanut butter and dropped them in the bowl.
The only reason I wouldn't hand feed is because they will get used to it, and then you will have another habit to break. Same thing with the peanut butter. I think if she's eating at least one meal (out of her two meals) then I wouldn't baby her that much.
If she's still being picky, ask your vet about an appetite pill. I'm not sure exactly what it was called, but a dog we were showing was a picky eater and after being on the appetite pill, he would eat it up. And after a while, he didn't need the pill anymore. He just eats his heart out!

