I am just seeing this now. I would just watch him closely. IF he was indeed hypoglycemic, you need to take him to a vet for an exam imo. If he has not had an exam and/or lab work done recently, then that is what I would do...make and appt with his regular vet. It is not common for a healthy, adult dog to suddenly be hypoglycemic from not eating. The only time I have ever had an adult dog be hypoglycemic was when there were other medical issues; and I have had many dogs in my home that did not eat. I have had fosters that did not eat for a couple of days and they were fine.
I won't venture to guess what was going on with him. Seems as if it were a fleeting issue..and perhaps it was because he had an upset tummy and/or needed to go to the bathroom.
I would just watch him closely and if he shows symptoms like that again, I would take him to the EC.
Hopefully, he is just fine now!
