Feline diabetes is more common than you might think. In fact, diabetes is one of the most common endocrine conditions found in cats. Anywhere between 1 in 100 to 1 in 500 cats develops diabetes,1 and those numbers are expected to increase.
While diabetes is typically diagnosed in older cats and neutered male cats are most commonly affected, diabetes has been diagnosed in cats of all ages, both sexes (intact and neutered), and all breeds.
Reference:
1. Panciera DL, Thomas CB, Eicker SW, Atkins CE. Epizootiologic patterns of diabetes mellitus in cats: 333 cases (1980–1986). J Am Vet Med Assoc. 1990;197(11):1504–1508.