The 2026 American Animal Hospital Association (AAHA) feline diabetes FAQ covers glucose-monitoring questions, missed or vomited medication doses, poor appetite, suspected low blood sugar and anesthesia. Its practical message is to interpret readings alongside the cat’s behavior and health, and to contact the veterinary team when a cat is unwell. Medication and dose decisions must be individualized with that team.
AAHA published its FAQ alongside the 2026 feline diabetes management guidelines on April 26, 2026. The guidance below explains the FAQ in caregiver-friendly terms; it is not a substitute for the plan made with your cat’s veterinarian.
How to interpret glucose readings and monitoring tools
A glucose value is one piece of information, not a diagnosis or a complete picture of how a cat is doing. AAHA recommends considering clinical signs and body weight alongside monitoring results. Its guideline takeaway is: “Monitor the cat, not just the numbers.”
| Tool | What it provides | AAHA’s guidance |
|---|---|---|
| Continuous glucose monitor (CGM) | Trends from interstitial glucose readings over time | Use when medically necessary and under veterinary direction. Current CGMs are not calibrated for animals, so interpret trends in context rather than treating a reading as definitive. |
| Veterinary-calibrated glucometer | Blood glucose readings from individual samples | Can be a practical option for serial monitoring. AAHA cautions that human-calibrated meters may be inaccurate for veterinary patients. |
| Fructosamine test | An estimate of average blood glucose over approximately 7–10 days | Use as one part of an individualized monitoring plan, not as a standalone verdict. Conditions that shorten albumin’s half-life, including hyperthyroidism and protein-losing disease, can lower the result. |
AAHA says in-hospital blood glucose curves are no longer recommended for routine diabetic monitoring in cats. Monitoring methods should be chosen because the results can help guide a veterinary decision, not simply to generate more numbers.
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When a CGM reading looks unexpectedly low
Assess how the cat is acting and, when available, confirm an apparent low with a veterinary-calibrated glucometer. A CGM result alone may not reflect the cat’s blood glucose accurately. If the cat appears unwell or is showing possible signs of hypoglycemia, contact a veterinarian or emergency clinic immediately and follow their directions.
When readings are high
Consider the cat’s condition and the pattern over time. AAHA cautions against treating a high CGM value alone as an emergency by applying human glucose thresholds to cats. Persistent high readings together with signs of illness warrant veterinary assessment.
If readings are erratic or missing
Erratic data or prolonged reporting gaps may mean the CGM is malfunctioning. Contact the veterinary team for advice about whether the information remains useful and whether another monitoring method is needed.
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What to do if a CGM sensor falls off
Data collected before the sensor detached may still help the veterinarian make treatment decisions. If it fell off before useful information was gathered, a replacement may be needed. For a replacement, AAHA’s FAQ discusses preparing the application site and considering additional adhesive; ask the veterinary team what is appropriate for your cat and the specific sensor.
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AAHA discourages relying on hour-to-hour numbers as the main measure of diabetes control. Most cats do not need a CGM continuously. The veterinary team can decide when CGM, blood glucose measurements or fructosamine will help answer a clinical question. Changes in signs or body weight also matter and should be shared with the veterinarian.
If a cat on insulin stops eating or drinking
Reduced food intake can make insulin-related hypoglycemia a concern. AAHA advises skipping or reducing insulin in this situation and contacting the veterinarian for instructions. Do not use a general rule to choose a dose: the appropriate action depends on the cat and its treatment plan.
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Persistent inappetence or illness needs veterinary evaluation. AAHA says a cat should not go more than 24 hours without insulin, and advises evaluation if minimal intake results in two or more consecutive half doses. Contact the veterinary team promptly rather than allowing repeated dose reductions to become the plan without supervision.
If a cat taking an SGLT2 inhibitor is unwell, vomits or misses a dose
AAHA gives different advice for SGLT2 inhibitors than for insulin. If a cat taking one of these medicines feels unwell, the FAQ advises evaluation for ketones. It says the next dose does not pose the same hypoglycemia risk as an insulin dose, but illness still needs veterinary attention.
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Vomiting after a dose
- If vomiting occurs within 30 minutes of the dose, AAHA says the dose can be repeated.
- If vomiting occurs later than 30 minutes after the dose, do not give another dose; resume the usual schedule the following day.
If the cat is ill or you are uncertain how the timing applies, contact the veterinary team for advice.
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A forgotten dose
Skip the missed dose, resume the usual schedule the next day and do not double a dose.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to do if hypoglycemia is suspected
AAHA advises offering food and contacting the veterinarian immediately. If the cat will not eat, its FAQ gives directions for applying Karo syrup and calls for prompt evaluation. Because the appropriate response depends on the cat’s condition, contact a veterinarian or emergency clinic at once for the specific instructions; do not treat syrup as a replacement for urgent assessment or as a reason to change the ongoing medication plan on your own.
Diabetes medication and anesthesia
AAHA advises skipping an SGLT2 inhibitor dose on the day of anesthesia. The veterinary team should coordinate glucose monitoring around the procedure and use short-acting insulin as needed until the cat has recovered. Tell the clinic about all diabetes medicines before the procedure, and follow its specific pre- and post-anesthesia instructions.
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Why diagnosis may require more than one glucose result
AAHA’s diagnostic guidance calls for evidence of sustained hyperglycemia. A single high clinic reading may reflect stress and is not, by itself, the whole basis for a diagnosis. Other evidence can include increased fructosamine or repeated hyperglycemia or glucosuria documented in a nonstressed setting or at home. Fructosamine reflects average blood glucose over approximately 7–10 days, but illnesses that shorten albumin’s half-life can lower it.
Food and feeding: prioritize reliable intake and the whole cat
AAHA recommends planning calories around an optimized body weight and an accurate account of what the cat eats. Monitor weight and body and muscle condition, and favor dependable intake of a complete and balanced diet over nutrient changes that lead the cat to stop eating. The guideline’s discussion prefers canned foods, but no single food or formula is right for every cat.
Concurrent disease can change the dietary priority. For example, advanced proteinuric kidney disease may make a renal diet more important than a diabetic diet. Meal feeding is preferred in some situations but is not essential; a timed feeder may help when free-choice feeding cannot be changed. Work with the veterinarian to choose a plan that accounts for the cat’s appetite, weight goals and other conditions.
Caregiver education is part of diabetes care
AAHA recommends introducing diabetes care in stages, using trusted educational resources, arranging follow-up and keeping communication open with the veterinary team. Ask the clinic to clarify what to do for poor appetite, vomiting, a suspected low reading or a missed dose before those situations arise. Keep the cat’s individualized instructions accessible to everyone involved in its care.
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