sheltielover,
I would look a bit more into this surgery and most likely use it as a last resort. The corpus callosum connects the 2 sides of the brain and allows them to communicate. So the way I assume the surgery works is to prevent seizure spread from the focus in one hemisphere to the entire brain (causing generalized seizures, including the grand mal/tonic-clonic). Not sure what implications cutting the corpus callosum would have in dogs, but I assume it would be similar to as in people--the many studies done in the past on so called "split brain" patients. These patients have loads of trouble in completing tasks which require one side of the brain to communicate w/the other. That being said, many of these tasks involve language and object identification, which is less of an issue for dogs. As (hopefully) a future epileptologist, I know that this surgery is not the first option in humans, (seizure focus identification and local resection is preferred), and non-surgical treatment is almost always preferrable to surgery, and surgery is only performed in people with intractable seizures, ie: no response to multiple medication trials. I would talk to the people on the k9 epilepsy forum; you'll probably find that medications work to control (not completely stop in some cases) their pets' seizures. My cousin has epilepsy and has had 2 brain surgeries--you don't want to go under the knife sorta speak if you can use meds w/tolerable side effects.
Cheers and good luck; hope the best for your pup.
