So a while ago my gray tabby went for his check up and the vet told me he was now at mild risk of diabetes, because he was officially overweight. The crazy thing is when I got home my husband measured the two cats. The gray is 3 lbs heavier than the ginger. He also happens from head to base of the spine to be 3 inches longer, therefore logic would dictate that he should weigh more since he is a significantly larger cat. Clearly the concept of BMI hasn't penetrated that vet's office yet!