How to Monitor a Cat with Diabetes at Home

What changed in the 2026 AAHA guidance

The AAHA 2026 feline diabetes guidelines say that diabetes care should not be judged by glucose numbers alone. Clinical signs, body weight, appetite, thirst, urination, and how the cat feels are part of the picture.

They also state that routine in-clinic blood glucose curves are no longer recommended for cats. Stress can change glucose readings, so AAHA places more value on home observations, continuous glucose monitors when appropriate, and carefully planned rechecks with the veterinary team.

Home monitoring vs a glucose curve

Home monitoring means the daily pattern you can see: appetite, meal amount, water intake, urine habits, weight, energy, medication timing, missed or uncertain doses, vomiting, and any signs that seem different from normal.

A blood glucose curve is a planned series of glucose checks across one dosing interval. Only perform one at home if your veterinarian has given you an exact schedule, method and safety plan. It can help the veterinary team review glucose changes during that window.

The difference is important: home monitoring shows how your cat is doing in real life over many days. A curve shows glucose behavior during one planned window. Neither should be used by a caregiver to change the dose independently.

What to log at home

Meal time, food type, and how much your cat ate
Insulin or other diabetes medication name, dose as prescribed, and time given
Missed, late, partial, vomited, or uncertain doses
Glucose readings or CGM notes, if your veterinarian asked you to track them
Appetite, thirst, urination, weight, vomiting, diarrhea, energy, and behavior
Any diet, medication, stress, routine, or illness change

AAHA notes that clinical signs plus serial body weight are crucial for monitoring. If thirst and urination improve, appetite is stable, weight is steady or improving, and your cat feels well, that context matters.

Glucose checks and CGMs

AAHA lists glucose monitoring situations such as 5-14 days after starting insulin or after a dose change, when diabetic signs come back in a previously controlled cat, or when low blood sugar is suspected.

A continuous glucose monitor can give much more information than one short curve and may reduce clinic stress. It still needs veterinary interpretation. Low or unusual readings should be discussed with your veterinarian, especially if they do not match how your cat looks and feels.

Urine glucose is not a routine tool for dose decisions. AAHA explains that urine glucose can miss dangerous lows and can be hard to interpret without blood glucose or CGM data.

Medication safety

Never increase, decrease, skip, repeat, or double an insulin dose unless your veterinarian has given you exact instructions for that situation. If you are not sure whether the dose went in, log it as uncertain and call your veterinary team or follow the written plan they gave you.

Keep the insulin type, concentration, syringe or pen type, dose, and timing written exactly as prescribed. AAHA notes that insulin syringes must match the insulin concentration, because U-40 and U-100 products are not interchangeable.

Some newly diagnosed cats may be treated with an SGLT2 inhibitor instead of insulin, but AAHA says not every cat is a candidate. Cats on these drugs need careful monitoring for ketosis and illness signs, especially poor appetite, vomiting, lethargy, dehydration, or weight loss.

Feeding and weight

AAHA says meal feeding is preferred but not essential, and that cats with diabetes may benefit from a low-carbohydrate, high-protein diet. The exact food plan should come from your veterinarian, especially if your cat also has kidney disease, pancreatitis, intestinal disease, or another condition.

Keep food changes controlled. A sudden diet change can change glucose needs, appetite, stool, and weight. Track the date of any food change, the amount eaten, and whether your cat accepts the food reliably.

Weight matters because improved diabetic control often means less unwanted weight loss. For overweight cats, weight loss should be planned by a veterinarian and monitored carefully.

When to call the veterinarian

Your cat is weak, stumbling, unusually sleepy, shaking, disoriented, or has a seizure
Your cat will not eat, vomits repeatedly, hides, or seems unwell
You gave too much insulin, are unsure whether insulin was given, or used the wrong syringe or pen
Drinking, urination, hunger, or weight loss comes back after being controlled
Glucose readings or CGM alerts do not match your cat's normal pattern
Your cat is on an SGLT2 inhibitor and has poor appetite, vomiting, lethargy, dehydration, ketones, or rapid weight loss

Low blood sugar can be an emergency. Ask your veterinarian in advance what to do if it happens, including whether food, corn syrup, honey, or glucose gel belongs in your cat's personal emergency plan.

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Questions to bring to your vet

What should I do if a dose is missed, late, vomited, or uncertain?
Should we use home glucose checks, a CGM, fructosamine, or another monitoring plan?
How soon should we recheck after starting treatment or changing a dose?
What symptoms mean same-day care for my cat?
Is my cat a candidate for insulin, an SGLT2 inhibitor, or another plan?
What feeding schedule and food type should we keep consistent?

FAQ

What should I track for a cat with diabetes?

Record medication times, meals, appetite, water, urination, weight, symptoms and any glucose information your veterinarian asked you to collect.

What should I do if I am unsure whether insulin was given?

Do not guess or repeat a dose. Contact your veterinary clinic and follow the missed-dose or uncertain-dose plan made for your cat.

Why should meals and medication times be logged together?

A shared timeline helps your veterinarian compare food intake, treatment and symptoms without relying on memory.

Can home glucose readings replace veterinary checks?

No. Home readings can add context, but your veterinarian decides how they fit with examinations, laboratory results and the treatment plan.

When should I contact a veterinarian urgently?

Follow your cat's emergency plan. Weakness, shaking, disorientation, seizures, repeated vomiting or a dosing mistake need prompt veterinary guidance.

Medical disclaimer

FeliVitals provides tracking and organization tools for caregivers. This article is not veterinary advice and cannot diagnose diabetes, choose a treatment, interpret glucose data, or change insulin or medication dosing. Always follow your veterinarian's instructions.