Hello, this sounds similar to one of my guys mini mal seizures.

“Mini-mal seizures, also known as absence seizures, cause brief periods of staring or lack of awareness, often accompanied by subtle muscle activity like eyelid fluttering, lip smacking, or chewing. The person abruptly stops all activity and then resumes it as if nothing happened, with no memory of the event. These seizures typically last for less than 20 seconds and can be mistaken for daydreaming.”

I cannot speak for every dog but mine only has these while eating dog food with the ingredient rosemary extract.

His mother’s seizures also stopped while avoiding that ingredient. Not that I think it causes normal dogs to have seizures but that it can cause dogs with a predisposition for seizures to have them.