Hello it looks like Doctor B has opted out of the question. It could be that she was called to an emergency. Just so you know, when you request a specific expert as you originally did and that expert is either not online or is no longer in the Dog category, all experts are locked out of that question for a specific time and not allowed to post an answer, unless the customer opens the question for all experts after 3 minutes. As well, experts do come on and go off line through the day.
I am not sure if you still need help with this or not but I am going to supply you with some information and hopefully you can use that to help you.
If you know for a fact that the dog did not get into something that caused the seizure, then the dog may be developing epilepsy. Some dogs with epilepsy only have seizures once every couple of months. If that is the case then usually nothing is done.
However it seems like your little guy has already had two in a short period and that would require vet care and possible medication for life.
I am going to direct you to a site that goes over epilepsy in dogs and it will tell you when it is an emergency , to seek vet help right away.
Your dog is a Maltese so you should know that they are also prone to white shaker disease. YOu will want your vet to also look into that. The link below goes over that as well.
Again I am sorry that you had to wait and hopefully the links will help you or you have seen your Vet. I am hoping for the best possible outcome.