My Little Dog Started Going In Circles And Seemed Confused. It Lasted For About 20 Minutes And Now Does Not Seem To Know Me. Could She Have Had A Stroke Or What Caused The Strange Actions?

It is possible that your dog is having vestibular disease that can occur due to head injury, ear infection, side effects of some medicines, ear polyps and thiamine deficiency. This condition can cause many symptoms like

1. Circling
2. Rolling
3. Falling
4. Drunken walk
5. Eye drift
6. Heat tilt
7. In coordination

Many investigation tools are needed to diagnose this problem like x-rays, CT scan, MRI, Spinal tab test, blood tests and neurological tests. So, take your dog to vet for accurate diagnosis and treatment.