
My friend has a collie, about 7yrs old. He's had a few seizures, and so far, no answers have been forthcoming.
I've only witnessed one but she tells me the others have been the same. In the one I saw, he was worried but otherwise ok, then he went totally stiff and fell over, legs out - as if I'd pushed over a figurine, say - and laid on the floor for maybe 5-10 seconds. Then he laid properly for 10 or so seconds, looking a bit out of it, then he was absolutely fine. Fortunately we were in the vet waiting room at the time - well, maybe not fortunate so much as this has been the trigger each time. The vet checked him over and didn't find anything untoward at all (he was in for a checkup on his foot after he got a foreign body in it).
The last one he had a few weeks ago, he'd been taken out back at the vet to have bandages changed after a separate foot injury, and he had the worst one yet - gums went white and he ended up admitted on a drip.
He's had an echo on his heart, he's got thickening of the heart valves but the vet is not concerned about this and says it shouldn't cause any problems until he's into his teens. He's just had an MRI which showed nothing. The referral vets have suggested taking fluid from his brain but my friend won't let them due to the potential side effects (I don't know what these are but she is adamant about this).
He is a generally stressy dog for various reasons, I am trying to persuade her to expose him less to other dogs as this is his main issue but all three seizures have happened at the vets.
If anyone has any ideas as to what might be going on we'd really appreciate it, she seems to just keep hitting dead ends atm.