Hello, I'm Dr. Deb and will do my best to help you today.
I'm sorry for this concern for Starskey.
Several thoughts come to mind as to why he might be behaving as you've described:
1. He could be having hypoglycemic (low blood sugar) episodes which are quite common in these small breeds although they typically last a little longer than just a few minutes. If such a problem might be suspected, though, I'm feed him 3-4 times a day if he's only currently eating once or twice. This should be enough to keep his blood sugar levels stable.
2. He might have a liver shunt which basically means that blood vessels bypass the liver which detoxify the blood. These toxins can travel to the brain and cause quite erratic behavior. Blood work is usually suggested to evaluate the liver with additional testing such as an ultrasound often needed to help confirm it.
Some patients can be managed medically while others might require surgery depending on the severity of the condition.
3. He might be having seizure episodes which could be secondary to either #1 or #2 above. Other possible causes might be head trauma or encephalitis or a birth defect or possibly other conditions which might affect the brain.
I would typically recommend blood work if this were my case and then suggest other tests such as an MRI depending on the results.
I would definitely change his feeding schedule as I mentioned above but if these episodes continue, then a vet visit will be prudent to pursue possible underlying causes for this behavior.
I hope this helps to provide possible causes for why he's acting this way; I know it must be distressing to see him act like this. Deb