Jaime-
thank you for your kind words. it's been nearly 10 years since we lost our jordan, who had the insulinoma, so it is not as painful to remember anymore, i just try to remember the many good times.
anyway, to try to answer some of your questions -
her symptoms began appearing one spring day after a long walk. she was approached by someone wanting to pet her, and did not react with her normal enthusiasm, just sat and stared at us.
when i got her home, she acted, well, drunk. she was stumbling and having trouble walking, it was as if she could not see, and her eyes were glazed over. this lasted only 3 or so minutes, but seemed like forever for a worried mom. i got her settled on the couch and kept her still. called the vet, and rushed her over. he guessed it was heat exhaustion from the walk, it was one of the first warm spring days. she seemed to recover within 15 or so minutes.
episodes like this continued, mainly after she was particularly active for a period of time. she was 10 or so at the time, so the vet attributed a bit of her condition to age, but i just knew something else was wrong.
each time she would have an episode, she would seem to lose control of her motor skills, be unable to stand or walk, and eventually slip into a short seizure like episode. she staggered, fell over, seized, and then would lie still for a minute or so. the episodes in their entirety lasted maybe 2 or 3 minutes, and then she slowly came around and was simply lethargic for a short time, other than that, no obvious residual effects.
my vet ran many tests for neurological disorders, any number of xrays and blood tests, and after a month or so, he admitted he was just ruling out diseases and conditions, and a diagnosis was beyond his scope of knowlege. we were referred to Purdue University's excellent vet clinic, where the diagnosis of the tumor and resulting insulinoma were made.
Jordan was on the pred. for a year or so, then began to show signs of liver damage. we made the decision to take her off the prednizone because of her advanced age. at this point, i was aware of the signs that her blood sugar may be getting low, and after discussing it with the vet, we both felt it would be best to prevent the episodes rather than to risk her liver failing.
again, she was 11 or so by this time, and less active than a younger dog. if she began to seem particularly lethargic or slow to respond to us after a bit of activity, i just gave her some of the glucose syrup i mentioned, and she was fine.
she lived to see her old age, 12, and spent her last year happily napping and being doted on. her last seizure was what took her life, it was massive and out of the blue, and lasted for at least 10 minutes, all the way to the emergency vet's. blessedly, she felt no pain during the seizure, and died in my arms at the vet's. the siezure was so massive, there would have been serious permanent neurological and organ damage, so we made the painful decision to let her go that night. my beautiful Jordan.
please don't beat yourself up about the dog food, i should have known better too.
the progression of the illness likely depends on the age of your dog. i think in an older dog, who is less likely to be as active, it is easier to control. i'm sure you know your baby well and will be able to tell if he is particularly lethargic, and may be able to tell his sugar is low, and can try the glucose syrup to see if it works for him.
again, we chose to take Jordan off the pred because of her advanced age, and the effects of being on a drug like that long term began to take a toll on her. we also chose not to operate, as the prognosis for that particular surgery and the recovery were grim.
whatever choice you make is your own, and deserves respect. after all, you clearly have your baby's best interest at heart.
my story is that we were able to control her symptoms and prevent any episodes we could, and dramatically shorten the duration and severity the episodes we couldn't prevent. it is possible for your Homer to have a great quality of life for whatever time he can spend with you. we were lucky enough to have 2 years after the diagnosis, and they were filled with wonderful boxer love.
i would be happy to share anything at all about Jordan and her journey with you if it helps even a little bit.
i'll be thinking of you and Homer, and will ask the universe for blessings and kindness for you both.