You didn't say how old your yorkie was. I have a 4 year old girl and she was just diagnosed with epileptic seizures. She had her first one in June of this year. She had a cluster of 3 in 3 days, so she had to go on phenobarbitol right away. Let me tell you it is pretty scary. She was seizure free for two months and then started having them again this month, so my vet is still trying to get the dosage right for her. She is only 3 pounds.
I hope your little guy does ok.. I know it is so heart wrenching to watch them go through this.
Casey & Riley's MOM