It sounds like a food allergy and the pred might be a bit strong for her to keep using long term.
If she won't eat the Eukanuba food try adding it slowly to her other food. Just a little more each day until she is eating only the Eukanuba.
Or you can see if she likes another low allergen food such as California Natural Lamb, Blue Buffalo, Wellness or Eagle fish, rabbit, duck, or venison formulas etc.
The licking and the paw chewing can all be signs of food allergies. With the other formulas they make treats too or you could feed her the Eukanuba if she will begin eating it and then use one of the other food as small treats for her.
Hope this helps you!
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