I don't believe that your dog had seizures due to the dog food, however, to be sure it would be best to contact the Blue Buffalo company and discuss the seizures with them. Have the lot number handy. There is always the possibility with any food (human or otherwise) that the food can become contaminated by a toxin, mold, parasite, infection, or other non-food component that can cause disease.
An MRI to check your dog's brain might be a good idea to rule out a brain abnormality. If her brain does not have any lesions or abnormalities than there is a much higher chance that the seizures were due to idiopathic epilepsy and they can be controlled by medication, and in some cases Chinese herbal medications. There are also metabolic causes of seizures but your vet can rule them out.
Milk thistle, choline and inositol, denosyl (SAM-E) and alpha lipoic acid would be good additions to your dog's dietary regimen to help lower her already elevated liver enzymes, and to prevent additional elevations that can occur with anti-seizure medications.
Kimberly, Although it's unlikely her food, I would check it out further....Blue Buffalo had a Recall of a number of their foods in the middle of October....The problem was excess amounts of Vitamin D. Yes, it was causing many problems.....
They were suppose to be pulled from the shelves, but I don't trust some stores judgement pertaining to recalls......I believe it was a number of their chicken recipes if I remember correctly....
Anyway, I would look into her food for this reason anyway.....
I hope she gets better.....Merry Christmas to you & yours, Karla