16yr old Marvin just had routine bloodwork completed apart of annual comprehensive examination and they detected high glucose level. We'll be following up with a urine test to confirm, but I presume this will more than likely confirm he has diabetes. He is/has been an overweight cat for most of his life (Norwegian Forest Cat) so I assume his risk was always much higher. Question for the forum- is there anyway normal diet intake could cause high glucose levels in bloodwork but not be the result of diabetes?