Have you tried to soften her food with warm water? If you are trying to feed her kibble the pieces might also be too large for her mouth. You can feed a combination of wet and kibble with water. At 8 weeks she is just learning to eat. She is very young to be away from her momma at only 8 weeks old. How much does she weigh?
I don't have a lot of experience with Nutrical but from what I do understand it should only be used in emergencies. Since it causes the sugars to spike but also makes them drop quickly it begins a cycle of what you are seeing.
Have you tried to put a little Karo syrup in her water? How often are you trying to feed her?
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