My dog has seizures. The first couple of times, it was really scary, she seemed really out of it and had a hard time walking around. She's about 10 pounds, so I would scoop her up and move her to the tile floor (because she would throw up and it's easier to clean on tile) and sit with her until it was finished. Normally she is standing and will try to walk so I would make sure she stays in one spot (I do this gently, I don't force her to do anything uncomfortable or challenging), I do try to sit her down if she's willing, and I just comfort/console her. It takes a lot out of her, so she's normally pretty exhausted after. It'll run its course and should be done in a few minutes. Hers are pretty mild so not sure what it would be like if she was violently convulsing. She normally shivers like she's cold and I pet her and let her know that I'm here for her. Not a whole lot else you can do, unfortunately.
As other answers point out, document what you can: did you give the dog any treats? Did he/she eat beforehand, drink anything? Could he/she have gotten into anything (i.e. garbage, something outside, other pet's food) that he/she doesn't normally consume? How long did it last? Was it particularly mild/violent? Was he/she acting strange beforehand (not as energetic, have any nerves)? Is the owner aware of this happening?
Good luck to you and I hope this helps you be more prepared in the future. It can be pretty scary but I've been informed (at least in my case) she's not in any pain and oftentimes she doesn't realize it's happening. Above all else, remain calm. Dogs feel what you're feeling, if you're calm, he/she is more likely to be calm as well. I hope this helps!
Do not intervene with the dog. It could be confused during and after a seizure. Time the seizure and document the duration. Report to client. If the client is aware of seizure activity usually they will have a place to document the seizure. Also, be aware if the dog ate anything.
Also if a seizure happens make sure they are in a safe place and can't get hurt or suffocate. Dont touch but stick close and talk reassuring them. it's scary for them. If it's longer them 5 min vet intervention is need. Document it and let owners know. Also ask if they have meds to stop seizures
I agree with both of these answers.
I had this happen. I did exactly what I would do for a human-and have had experience with that. Make sure they are in a safe space. Stay with them during and after. Generally they don’t last long, but if they do contact vet afterwards.
I agree with Sherri 100%. Calling the vet is important afterwards, but staying with the dog and keeping them safe is essential during the seizure.
Get an ice pack and place it on the dog lower back. Get a cover and pit it over the dog head. To claim the dog down. Also for your protection. A dog is not in control.
All of the above, and also be very careful to not put your hand/arm near the dog's face. Like Dalvin says, the dog is not in control, and could snap and bite and not realize they are doing it, of course. My dog bit a blanket once during a seizure. When he came out of it.