Always told people the hardest part of owning a pet isn't the house training, the walks, the vet bills, picking up the poop, etc. It's the twilight years of a pets life. Everything starts going at a certain point and seeing a pet in pain and suffering is the hardest thing anyone can experience because there is nothing you can possibly do but watch your pet go through the motions. Most times vets can only do so much. I'm dealing with it now with my 11 year old pug with her epileptic and grand mal seizures (she is on life long seizure meds to help contain that), often restless and moves around frequently in the middle of the night, and she can't walk down the stairs anymore in the back yard because of her arthritis. Its tough and I absolutely feel your pain with what you are going through. My dog has been through so much with me and it's heartbreaking. Only pet owners can relate. Cherish every minute you have left with your dog. Take nothing for granted. Good luck at the vet tomorrow and please keep us posted on Gizmo.