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What monitoring is meant to achieve
The aim is to control excessive thirst, urination, and appetite while maintaining ideal body weight and avoiding complications such as hypoglycemia. The American Animal Hospital Association (AAHA) considers diabetes well controlled when these signs are absent and body weight is stable or increasing. Glucose results matter, but they should be interpreted alongside the dog’s health, weight, and usual routine—not treated as a target in isolation. AAHA’s Section 5 guidance, published August 31, 2026, states: “Spot-checking BG is unreliable; obtain a blood glucose curve (BGC) either with the patient at home or in the clinic, or place a CGM.”
Ways veterinarians assess glucose response
Blood glucose curves
A BGC consists of serial blood glucose measurements across an insulin dosing interval. In the AAHA protocol, the first measurement is taken before feeding and insulin (time zero); after a normal-sized meal and the full insulin dose, measurements are taken every two hours for up to 10–12 hours. The resulting pattern can help the veterinary team assess the lowest glucose point (nadir) and how long the insulin appears to act. Curves are snapshots: glucose response can vary from day to day, so results need to be considered with the dog’s signs, weight, and routine. For intermediate-acting insulin, curves lasting up to 12 hours are common. AAHA’s glucose-monitoring guidance describes veterinary-calibrated portable meters as practical for serial readings and does not recommend human-calibrated meters, which may report inaccurately for veterinary patients.
Continuous glucose monitoring
CGM tracks interstitial glucose over time and can help reveal patterns, including low glucose that might otherwise go unnoticed. It can be useful when the veterinary question involves a longer observation period; AAHA notes that basal-insulin cases may benefit from assessment lasting more than 24 hours. CGM values are not always identical to blood glucose. If a dog has a low CGM reading but no apparent symptoms, AAHA says confirmation with a veterinary-calibrated portable blood glucose meter is ideal before treatment is changed.
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Fructosamine and other context
Fructosamine may be used when the veterinarian needs additional context, including helping distinguish stress-related hyperglycemia from diabetes. Urine glucose is occasionally useful—for example, in screening for hypoglycemia—but is not recommended as a routine monitoring tool. These methods complement assessment of the dog’s signs and weight; they do not replace it. The Merck Veterinary Manual’s May 2024 review also discusses fructosamine and day-to-day variability in glucose curves.
Choosing between a curve and CGM
Neither method is universally best. The choice depends on what the veterinary team needs to learn, the dog’s insulin regimen, and what is practical at home or in the clinic.
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| Method | What it can help assess | Observation period and practical consideration |
|---|---|---|
| Blood glucose curve | A serial glucose pattern, including nadir and apparent duration of insulin effect | Periodic measurements across a dosing interval; AAHA describes measurements every two hours for up to 10–12 hours after a normal-sized meal and full insulin dose. |
| CGM | Glucose patterns over a longer period, including possible subclinical lows | Tracks interstitial glucose over time; AAHA says assessment longer than 24 hours may benefit some basal-insulin cases. Low readings without symptoms should ideally be confirmed with a veterinary-calibrated meter before treatment changes. |
| Fructosamine | Additional context about glucose, including helping distinguish stress-related elevation from diabetes | An additional veterinary assessment when indicated; it does not show the same serial, within-interval pattern as a curve. |
How often to recheck
AAHA’s 2026 recommendations give a schedule for veterinary-directed dose finding and ongoing follow-up. The intervals are guideline recommendations, not a substitute for an individualized plan.
- While finding an acceptable dose: perform a BGC every 5–14 days, or use CGM to guide titration every 3–7 days. AAHA also recommends a physical examination, including body weight, at least every two weeks during this phase.
- After an insulin dose change: obtain a BGC within 5–14 days or use CGM monitoring.
- Once control is attained: arrange evaluation every 3–6 months, with the log reviewed and weight assessed.
- If signs return or a low is suspected: contact the veterinary team for reassessment rather than waiting for the next routine appointment. Glucose monitoring is particularly useful when signs suggest loss of control or hypoglycemia.
What to record at home
A consistent record helps the veterinary team interpret a curve or CGM pattern in context. AAHA recommends recording food and water daily, the insulin dose, unusual events such as vomiting or lethargy, and signs that might indicate hypoglycemia. Bring the log to rechecks. The AAHA resource center provides a blood glucose curve worksheet and owner material on insulin administration.
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- Note thirst, urination, appetite, energy, and any changes in body weight.
- Record meals, water intake, insulin administration, and the dose given.
- Write down unusual events, including vomiting, lethargy, or possible low-glucose signs, and when they occurred.
- Share the record with the veterinary team; do not use one home reading by itself to declare control or change the dose.
What to do about a low reading
AAHA states that monitoring blood glucose or interstitial glucose through CGM is the only way to identify hypoglycemia. If a CGM shows a low value and the dog has no clinical signs, contact the veterinary team about confirming it with a veterinary-calibrated portable meter before treatment is changed. If hypoglycemia is documented, the veterinarian may consider reducing the dose.
If the dog is showing signs that could indicate hypoglycemia, treat the situation as urgent: follow veterinary guidance, which may include offering food or a sugary solution when appropriate, and seek veterinary assessment. AAHA’s treatment pathway includes withholding further insulin until hypoglycemia has resolved; this is urgent clinical guidance, not a routine home dose-adjustment rule. Do not increase insulin based on an isolated high spot reading. An apparent high or persistent signs can have causes other than too little insulin, and inappropriate dose changes can lead to hypoglycemia.
Quick Recap
Best Value
- Built for Beginners: Designed for pet owners testing blood sugar at home for the first time, the dog glucose monitoring kit keeps things simple. The 25 safety lancets use a push-button draw for the simplest blood sample method. No adjustable depth, no loading a lancing device. Just press until it clicks. PetTest keeps it straightforward with all-inclusive diabetic pet supplies so you can start testing with confidence.
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- COMPLETE TEST KIT: Starter kit contains everything need to start measuring your pet’s blood glucose. This set has a meter, test strips, lance device, control solution, and 28-gauge lancets. Plus, a high-quality case to store the meter and accessories.
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- BUILT SPECIFICALLY FOR YOUR DOG OR CAT. Better control over glucose levels may help minimize complication and avoid unn
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