What age, breed and weight is she?
what are her symptoms?
when did she eat that ?
She may be dehydrated an hypoglycemic.
First put a drop of pancake syrup on her tongue to raise her blood sugar in case she is hypoglycemic. That should perk her up.
Shaking can be a symptom of pain, fear, fever, nausea,or illness.
Next offer her boiled chicken, beef or cottage cheese and see if she will eat.Add plain pedilayte to her water to hydrate her and balance her electrolytes.
She may have any OTC on www.wolfdancer.org/health scroll down for list and dosages.
Please let me know if she eats an how she is doing. If you have more questions, I will always be here for you.