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What the 2026 guideline is and who it is for
The guideline is a dog-specific reference written for veterinary teams. It covers diagnosis, insulin treatment, monitoring, troubleshooting, diabetic ketoacidosis (DKA), diet and communication with clients. For the first time, AAHA has split its diabetes guidance into separate canine and feline documents. AAHA Chief Medical Officer Jessica Vogelsang, DVM, said the division was made “in recognition of the unique nature of the disease process in each species.” If you have seen older combined dog-and-cat advice, the canine guideline is now AAHA’s current reference for dogs.
Task force member Audrey K. Cook, BVM&S, MSc Vet Ed, FRCVS, DACVIM, DECVIM, DABVP (Feline Practice), linked the update to practice changes: care of diabetic dogs “has changed dramatically over the last few years, with the advent of inexpensive continuous glucose monitors and a new understanding of how to leverage long-acting insulins.” Both quotations come from AAHA’s September 1, 2026 release.
Use the guideline as the framework your veterinarian works within, not as a home dosing protocol. Insulin choices, dose changes and interpretation of monitoring results belong to the dog’s veterinary team.
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How diabetes is diagnosed in dogs
Common signs that prompt a diabetes workup are increased urination and thirst, increased appetite and weight loss. The guideline notes that the average canine renal threshold for glucose is 160–200 mg/dL. Once blood glucose rises above that range, glucose appears in the urine, which is why glucosuria matters in the diagnostic picture.
AAHA’s summary of the Project ALIVE criteria describes diabetes as present when a dog shows all of the following:
- Blood glucose of at least 200 mg/dL, measured fasted or nonfasted.
- Glucosuria (glucose in the urine) together with characteristic signs.
- No other plausible cause for the findings.
A hyperglycemic crisis can also meet the diagnostic picture. These are criteria for veterinary diagnosis, not a home test.
Two distinctions matter for owners. Ketones may appear in the urine, but ketonuria does not by itself mean diabetic ketoacidosis. The guideline also separates clinical diabetes from transient insulin resistance and other conditions that can cause sustained insulin resistance. Because absolute insulin deficiency can lead to ketosis within several days, a dog may show overt signs for a relatively short time before it is examined.
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Treatment goal: control the signs first
The guideline describes diabetic dogs as absolutely insulin deficient and dependent on insulin therapy. Most dogs tolerate lifelong treatment well, and prognosis is good with appropriate therapy and monitoring.
Why the goal is clinical control, not a single number
AAHA states that the primary goal of treating canine diabetes mellitus is to control clinical signs (Section 7, Troubleshooting in Diabetic Dogs). The guideline says tight glycemic control is rarely possible with twice-daily intermediate-acting insulin, which is why the benchmark is the dog’s condition rather than a narrow glucose range.
Brief high readings in a controlled dog
AAHA says occasional brief blood glucose elevations above 300 mg/dL may occur in clinically controlled dogs receiving twice-daily intermediate-acting insulin. Such readings do not necessarily require additional workup. The 300 mg/dL figure is not a stand-alone treatment trigger.
When signs persist
Persistent polyuria, polydipsia, polyphagia or weight loss warrants review with the veterinary team. The review covers insulin administration, dose, diet, the dog’s insulin response and any concurrent disease.
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Blood glucose curves: what they show
A blood glucose curve is a serial test that shows how insulin behaves over a day in one dog. As the guideline describes it:
- A baseline blood glucose measurement is taken.
- The dog eats a normal meal and receives the full insulin dose.
- Readings are taken, typically every two hours, for up to 10–12 hours.
- The results identify the nadir (lowest point), the duration of insulin effect and the degree of fluctuation.
AAHA’s stated ideal nadir is 80–150 mg/dL. The guideline cautions against prolonged subclinical hypoglycemia below 60 mg/dL, meaning low glucose that continues without obvious signs. These are veterinary interpretation parameters, not instructions for owners to change a dose.
Comparing monitoring methods
Monitoring approaches differ in what they measure, how long they cover and how reliable the device is for a dog. The guideline does not recommend choosing a method based on device convenience alone.
| Method | What it captures | Time frame | Calibration and device note | Main strength and limit |
|---|---|---|---|---|
| Serial blood glucose curve | Glucose at intervals after a normal meal and full insulin dose | Readings typically every 2 hours for up to 10–12 hours | A veterinary-calibrated meter is preferred | Shows the nadir and insulin duration; reflects one day |
| Continuous glucose monitoring (FreeStyle Libre discussed by AAHA) | Glucose trends in the dog’s normal environment | Continuous; sensor duration not stated in the guideline summary | Readings can differ from a veterinary-calibrated meter; confirm low readings before changing therapy | Shows patterns at home; unexpected high or low readings may need confirmation |
| Fructosamine (glycated protein) | Longer-term glycemic control | Longer-term average; exact window not stated in the guideline summary | Not stated | Gives a longer-term picture, not the timing of lows or insulin duration |
| Spot reading with a people-calibrated meter | Glucose at one moment | Single time point | Not recommended for veterinary use because calibration differences can make results inaccurate | Quick, but a single value that can mislead |
Which glucose monitor can I use for my dog?
The answer depends on the device’s calibration for veterinary patients and on who interprets the readings. Ask your veterinary team which meter the clinic uses for serial testing and whether a home device is appropriate for your dog.
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Veterinary-calibrated meters
AAHA’s discussion of practical serial monitoring names the AlphaTrak 3 as an example of a veterinary-calibrated meter. It is an example, not an endorsement, and availability should be confirmed with your clinic.
People-calibrated meters
The task force does not recommend people-calibrated glucose meters for veterinary use. Calibration differences can make the results inaccurate, so a reading from one of these meters should not be used to make treatment decisions without veterinary guidance.
CGM sensors such as FreeStyle Libre
AAHA discusses FreeStyle Libre as a CGM used in veterinary patients. CGM shows trends in the dog’s normal environment, which can reveal patterns a single clinic reading misses. Its readings can differ from a veterinary-calibrated meter. Before changing therapy, confirm a low reading with a veterinary-calibrated point-of-care meter, particularly when the dog shows no signs of hypoglycemia. Compatibility and availability should be checked for the individual dog.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When glucose should be measured
AAHA describes monitoring in these situations:
- Five to 14 days after starting insulin or changing a dose.
- When signs recur in a dog that was previously well controlled.
- When hypoglycemia is suspected.
Reading the numbers alongside signs and weight
The guideline is clear that clinical signs and weight remain essential. No single glycemic assessment consistently separates well-controlled from poorly controlled dogs.
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AAHA cites a Briggs et al. case review from 2000. In a review of 53 canine diabetes cases, all glycemic assessments and glycated protein concentrations agreed with good control in only 60% of dogs classified as clinically well controlled. The finding is a reason to read measurements together with the dog’s condition. It is not a population-wide estimate of how accurate monitoring is.
A simple home log helps the veterinary team see the whole picture. Record appetite, drinking, urination, weight, insulin doses and times, and any episodes of weakness, and bring the log to each visit.
Home routine and when to call the veterinary team
The guideline advises owners to keep a consistent care routine, including feeding and insulin timing, as directed by the veterinary team. It also advises contacting the team when signs return or when hypoglycemia is suspected.
For insulin technique, AAHA’s resource center offers a client handout titled “How to administer insulin to your dog,” along with videos. Syringes must match the insulin concentration on the vial, such as U-40 or U-100 insulin. Ask your clinic to confirm which syringe type goes with your prescription.
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What this article does not cover
- Dosing, insulin selection and dose changes, which are decisions for the veterinary team.
- Diet recommendations, which the guideline addresses for clinicians.
- Diabetic ketoacidosis treatment, which the guideline covers in detail for veterinary teams.
- Device specifics beyond the examples AAHA names. Individual patient compatibility and availability vary.
For questions about your own dog, the veterinary team that prescribes insulin is the right place to start.
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