It is fairly common for diabetic cats to urinate and sometimes defecate outside of their litter boxes. See the further discussion here.

With all cats, diabetic or not, you should practice meticulous litter box hygiene. The link below[1] has an excellent article on caring for a litter box.


  1. The Litter Box From Your Cat's Point of View-Dr. Lisa Pierson
Community content is available under CC-BY-SA unless otherwise noted.