Dog teeth chatter/ tremor

My three year old jack russell/ rat terroir's teeth chatter for about 10 seconds and then stop. This happens less than 1 time a week.. Maybe 3 times a month for the past 3-4 months. Not during play, odd temps, or anything so really thought nothing off it as he didn't act funny before or after the short episodes. Also, he is fully responsive when this happens and if I massage his jaw (which he loves) as it happens then he stops immediately.
So this morning I had just left and my fiancé said that his teeth started chattering for about thirty seconds, his eyes rolled back, and he passed out/moaned. After he got up and looked scared but other then that seemed normal. He ate and played soon after...
My initial thought was that he wasn't getting enough oxygen for the thirty seconds of chattering and there for passed out but I am really worried it may have been a seizure...
Does anyone have any insight or ideas? I can't get into the vet until later tonight, possibly tomorrow morning...

He was also at a doggy day care all weekend and I had just left so maybe stress related?! Just hoping and praying it isn't a reoccurring thing..

On 9/22/2014 1:12 PM, wrote:
My three year old jack russell/ rat terroir's teeth chatter for about 10 seconds and then stop.
So this morning I had just left and my fiancé said that his teeth started chattering for about
thirty seconds, his eyes rolled back, and he passed out/moaned.

............Could be a bunch of things -epilepsy, Addison's disease,
diabetes, congenital heart issues causing circulation problems, etc.
Pain can cause teeth chattering, but I can't imagine it making a dog
pass out. You really need a full panel of bloodwork = chem panel and
CBC to start. There may be more tests later if they don't find anything
that causes his issue. Most accurate bloodwork is after a 12 hour fast,
but if this isn't possible, just get the BW as soon as possible.

Best of luck to you and your pup.
buglady
take out the dog before replying