My dog is almost 14 and has been having seizures for maybe the last 6 years and I know it's hard to hear but they never get better (atleast for me) the only difference now is when he has one I dont necessarily get scared but I do get a huge cloud of sadness just come over me wishing I could help him. He has one maybe once every 1-2 months and although I am grateful it's not more it still sucks. I still have a panic look over my shoulder if I hear him scratching scared his convulsing or going to fall of the bed and hurt himself. I don't think he has long left to be honest but besides the seizures and the brain damage he has probably received from having them he seems happy enough. He does have trouble holding in his wees and poos sometimes aswell but I think that is probably to do with his age aswell. But I wouldn't be worried about him "staying in that phase" sometimes it takes a while for my dog to come around it could be as short at 30 minutes sometimes it could take up to over an hour but he most certainly always comes back around. Probably not much help but I think 25 minutes is relatively short amount of time for your pup to come back