Just reading your update from last night...
good news.
The vaccine/seizure relationship may be a possibility, although typically a negative reaction comes within hours, not days, post vaccines. The fact that Knox is playing happily and acting normal right now makes me think a brain infection
may not be the culprit. Typically with brain infection the pup is acting "down" and not eating well. What was your vet's response when you asked about brain infection? It may be that having the tap done is not the right way to go with Knox behaving so normally...and would be just added stress for Knox and all of you. It is always hard to know what the correct direction is with medical issues that are out of the ordinary.
Thank you for keeping little Knox in your thoughts!! He is still doing wonderful and no more seizures since his last. He is eating like a horse, playing like a normal puppy would, and enjoying the snow here in Pittsburgh! He loves to dig his nose down in it then flip it in the air, he's definitely a wild man. He will be going to the vet on the 16th to check his Pheno levels since he started his meds, and fingers crossed we have no visits before that! He is a real fighter and has an attitude of his very own

He realllly likes to bite when playing. We tell him no, and give him a bone/toy to try to show him thats is an acceptable thing to chew but he doesn't like that. Also, when you tell him "no" he will sometimes listen, but sometimes he will just bark at as like he is mad at us. I've never had a puppy that is so headstrong with these things, and we are finding it difficult to put to a stop...any suggestions?
Thank you Trini