Normally, food is converted into a form of sugar called glucose. Cat and dog urine test results should be negative for glucose.
If the glucose in the blood is significantly higher than normal (for example in diabetes) some of the excess will be found in the urine. Glucose levels may falsely appear elevated, so it is important to repeat any test results within 48 hours.
Increased levels of glucose may indicate diabetes, but there are several other diseases not related to diabetes that can cause glucose to spill into the urine.
If your test shows a positive result for glucose, you should take your dog or cat to your veterinarian for a glucose blood test. Early detection is extremely important.