Thanks for that information.
I asked these questions because there is a condition called vestibular disease that often is missed by some veterinarians. It’s possible your dog is suffering from vestibular disease. Symptoms include standing with legs spread out, swaying, head tilt, abnormal eye movement, walking sideways, falling over and may include vomiting. There are a few things that can cause this condition such as an ear infection, some medications and old age. `Here are some great sites on this condition:
The good news is that if this is the problem and it is due to old age, the condition normally resolves itself over a few weeks. Your vet could prescribe dramamine or bonine to help with the symptoms. You can read about dramamine and bonine usage, precautions and dosage here:
Other possible cause is a stroke. With strokes, there is often improvement within a week though it may take several weeks for significant improvement and a dog may not totally recover. Read about strokes here:
Aquired hydrocephalus can cause similar symptoms as you can read about on the following site. Be sure to click next to read about treatments
I would also suggest seeing a neurologist given her age and symptoms.
I hope this information is helpful to you.