Unfortunately, dogs (and cats) can have hypoglycemia as well as diabetes, and as with humans, there is no age limit as to the onset of either. I hate to think of any animal having to endure either disease. Epilepsy isn’t a cut-and-dried disease in animals, either, so whatever it is, I hope it’s only temporary.
As for spaying, it was thought for years that waiting for a first heat was the best thing for dogs as well as cats, and then that changed to “there’s no medical reason why it shouldn’t be done before that.” By the early ‘90s, it was common practice to spay and neuter animals any time after they were three months old.
At the county animal shelter in Vegas, if puppies and kittens were brought in or born at the shelter, they were spayed or neutered before they were adopted or the new owners were given certificates for a free spay withing a three-month period.
I’m beginning to think the spay/neuter thing is an item of personal preference for the veterinarian.
Our vet thinks that if you spay a female before her growth plates are closed it could lead to hip problems later. We spayed 2 previous females and did not have that problem.