Health..Dont know what to do

Question
I have a female toy poodle that is about to turn 7 years old. Recently, I came home from work and found her laying on the floor with her legs spread out. She was very cold and stiff. I immediately rushed her to the vet and he told me that she was extremely dehydrated. She was put on the IV. That night she was less stiff and mostly slept. The next day, I still did not feel right about her condition and so I took her to the vet again. He again put her on an IV and gave her a shot of B12. He prescribed a vitamin medication and told me to give her pedialyte and gatorade to keep her hydrated besides the water and normal diet.
She is now starting to feel better and she is walking but she shakes a lot (like if she is cold) and she also bobbles her head like if she cannot keep her head up. I know that part of the reason that is not eating her normal kibble and not drinking water what-so-ever. I have to force her to drink water with a syringe that way I know she stays hydrated.
Can you please tell me what I should do about her drinking and eating problem? What type of food should I give her? Do you think that she could just want a change in food? Have you ever heard of a condition like this? Thanks

Answer
Now I am a breeder and NOT a vet so please keep that in mind while reading this.  I would also recomend that you take her to the vet and have some bloodwork done possibly looking for a heart condition called PDA, or Epilepsy, or possibly addisons disease.
It almost sounds like a stroke to me.  Therefore I am thinking that she now has a neurological issue going.
I would also tell you NOT to use gatorade and just use the pedialite as gatorade is very harsh and has too much salt in it and can cause dehydration in dogs rather than helping it.
To keep her hydrated you may also have to resort to using electrolytes given in saline solution and administered by you via needle into the tissues in the back of the neck every few hours.  For food I would recomend some baby food that DOES NOT contain onion powder in the ingredients as Onions are toxic to dogs.  This you can mix with a little bit of canned food and it will be easier to force feed.
This condition has nothing to do with wanting a change of food and I do not recomend changing your dogs food unless they have gotten an allergy to it or are have coat and skin issues.
I would want to find out what the underlying cause is of this problem.  This is a serious issue and needs to be addressed.  You may find yourself making so very difficult decisions in the future if this continues.
Could your dog possibly have had a seizure why you were gone that lead to this neurological issue being the aftermath?  Maybe there is a specialist in your area that you could talk to.
In the meantime here are some health concerns that exist in the poodle that could have resulted in your dogs current condition that you may want to investigate more.

PATENT DUCTUS ARTERIOSUS (PDA)
Is the most common congenital heart defect seen in dogs. The vessel that carries the blood in neonate puppies closes immediately at birth. This disease happens when this vessel does not close at birth. This can cause an overload on the left side of the heart which causes an enlargement of the left side of the heart. A bounding pulse and heart murmur are signs of this disease. Dogs with this disease should NEVER be bred.
More information can be found at this site
http://www.stvetspecialists.com/PDA.htm

Addisons Disease
This disease is caused by the adrenal glands not producing enough cortisone and aldosterone. Symptoms may include decreased appetite, increased thirst, vomiting, diarrhea, lethargy and weight loss. The dog will require medication for the rest of its life. Dogs are tested for this disease by a simple blood test. This test does not prove/disprove carrier status. The dog may test clear but could still develop the disease later in life and may produce puppies with this disease.

More information can be found at this site

http://www.poodleclubofamerica.org/health.htm

Epilepsy
This is a serious disease that causes your dog to have convulsions. Convulsions can be caused by many factors: injuries to the head, ingested poisons, or inherited genetic disease. Dogs with this condition should NOT be bred, no ifs ands or buts. The treatment is anticonvulsant medication. There is no test available for this disease.

This disease most commonly starts in dogs 2-3 years of age.
More information can be found at this site

http://www.poodleclubofamerica.org/health.htm