Lucy is a healthy 9 month old Labrador Retriever puppy. Her owners came to the vet because she was experiencing multiple sudden onset seizures that she never experienced before. Owners stated that it may be possible that she got into something and that a pack of gum is missing from owner's purse. Sugar free gum often contains a toxin called Xylitol.

What could be the potential reason for the sudden onset seizures and how are you going to test or diagnose the patient?