Our previous dog got diabetes aged eight and, had to be injected twice a day to keep her stable, she lived till Fifteen, at the age of nine she got cataracts (a side effect of the diabetes) so was effectively blind for six years, it takes a lot of commitment to keep a diabetic dog going, not sure we could go through it again. I wondered why the Vet kept laboring the point when she was diagnosed, we certainly underestimated the task.