[header] How to spot feline diabetes [title] Notice if your cat has increased thirst. [step] Diabetic cats aren't able to absorb and use glucose properly, which leads to abnormally high levels of glucose being filtered out through the urine. When this process occurs, extra water is carried out of the body along with the glucose.
This means that your cat is losing too much water and will start trying to counter this by increasing their water intake. [substeps] Watch your cat's water bowl to see if the water levels are decreasing more quickly than usual.