Long story short, we have an 8.5 year old Australian Shepard with a history of seizures. He got his first a couple of months after turning 2, then one a year on average until January of 2023 when he started having one almost monthly. He's now on Kepra and Gabapentin, which unfortunately isn't reducing the quantity of seizures, but they seem to be less severe.

Well he had one this morning, and he was luckily in my line of sight when it started, so I was able to get him scooped up and outside before the drooling and bowel loss started. Again, it was relatively non-severe. However, a couple of hours later, he started limping, favoring his rear left leg. It's gotten progressively worse as the day has gone on.

I've looked at it; there's nothing obviously wrong with his foot, and he doesn't seem to be in any pain when I touch the leg. He ate and drank just fine, but isn't acting himself fully, which isn't abnormal the day of a seizure.

I'm just concerned about this limp - I am assuming it's neurological and somehow related to the seizure, this has just never happened before.

Any input from our local experts?

I had an English Springer with Cushing's Disease. Seizures became common as it progressed. She would have problems with a leg for a few days afterwards. No rhyme or reason to which leg it would be. She would be back to normal in about 2 days.

We had a German Shepherd that started having gran-mal (sp?) seizures at about 11/2 years old. Same as you about 1 a year for 3-4 years. Then they happened more and more often.
So sorry you guys going through that. It ain't pretty and you feel helpless.
Our GS would from time to time after a seizure limp or show favor to a leg/hip. Our vet said the muscles are contracting very hard and can cause muscle strains or even pulled tendons etc. as they age and have seizures.
Luckily for us he would be ok within a week.
Hope all works out for you for sure.
The seizures also took a toll on his eyesight/hearing as well.

Your dog might be experiencing a Todd's Paralysis, which is a relatively common, focal loss of strength /weakness that typically occurs after a seizure. It usually lasts a few hours to a couple of days. It should self resolve.