Smart protocols
Working through a diabetic dog now?
Use this page as a reference. For a patient-specific workflow, the Canine Diabetes Protocol starts with clinical stability and ketone status. It then uses estimated ideal body weight and the selected insulin to organize the starting plan, device, handling instructions, owner guidance, and monitoring pathway.
Start with the outpatient decision, not the dose
A newly diagnosed diabetic dog may look ready for a routine starting plan. First decide whether outpatient management still fits.
Confirm that outpatient management fits
A systemically unwell diabetic dog needs further assessment before moving into a routine outpatient insulin workflow.
Ketones also change the next step. Ketonuria alone does not diagnose DKA, but a ketotic diabetic dog should be assessed for DKA and concurrent illness. When a dog is sick and ketotic and acid-base status cannot be measured, the 2026 AAHA guideline advises treating the patient as DKA.
The starting insulin calculation comes after this decision.
Build the starting plan around the patient
The starting plan depends on the dog's estimated ideal body weight and the insulin selected. Vetsulin or Caninsulin and NPH remain good first-choice options according to the AAHA task force. PZI and glargine U-100 are additional options. Basal insulins such as glargine U-300 and degludec may allow once-daily treatment in some dogs.
Record the starting plan as one set of instructions
Before discharge, record the selected insulin, starting dose, subcutaneous route and interval, matching syringe or pen, handling instructions, and monitoring plan together. For Vetsulin or Caninsulin and NPH, AAHA gives a starting range of 0.25 to 0.5 U/kg every 12 hours. Calculate from estimated ideal body weight and round the starting dose down. Other formulations have their own starting and device rules.
Check measurability in small dogs
A calculated dose still has to be deliverable accurately. Check the rounded dose against the syringe or pen increments before finalizing the plan, especially when it is close to the device's minimum increment.
Choose the insulin and syringe together
Insulin concentration and syringe concentration are one decision. A U-40/U-100 syringe mismatch can deliver either 2.5 times the intended dose or only 40% of the intended dose.
Vetsulin or Caninsulin
If dispensing a vial, use a U-40 syringe. If dispensing a cartridge or pen presentation, use the manufacturer-specified pen and compatible needle. Confirm the current local label for the exact presentation.
NPH
NPH is U-100. Match vial presentations with U-100 syringes or use the appropriate manufacturer-specified pen when applicable.
ProZinc or PZI
PZI is U-40. Match vial presentations with U-40 syringes.
Glargine U-100
Glargine U-100 requires U-100 compatible equipment. Confirm the exact formulation and presentation being dispensed.
Glargine U-300
Glargine U-300 must be administered using its manufacturer-provided pen. U-300 insulin syringes are not available.
Degludec U-100 and U-200
Check the exact concentration and presentation. Degludec U-200 must be administered using the provided pen rather than an insulin syringe.
Write the insulin name, concentration, exact presentation, and matching syringe or pen beside each other.
Match the handling instruction to the insulin
A generic instruction to mix the insulin is not specific enough.
- Vetsulin or Caninsulin
- Shake until the suspension is homogeneous and uniformly milky, then follow the current product label.
- NPH, PZI, glargine U-100, and degludec vials
- Roll rather than shake the vial. For pens and other presentations, follow the handling, priming, and administration instructions for the exact product being dispensed.
Make the owner plan specific
A dose on a discharge sheet is not a complete home plan.
Before the dog goes home, write down:
- Insulin name, dose, interval, concentration, and matching device.
- How to store and prepare the selected insulin.
- Feeding and injection timing for that formulation.
- What to do if the dog eats less than expected, refuses food, or vomits.
- How to recognize possible hypoglycemia and what to do next.
- What the owner should monitor at home.
- The date and purpose of the first recheck.
For bolus insulin, give the full dose after the dog has eaten at least 50% of the meal. If less than 50% is eaten, the 2026 AAHA guideline advises half of the usual dose and contacting the veterinary team if this happens for two consecutive meals. Basal insulins such as degludec and glargine U-300 do not need to be given with a meal, so their home instructions are different.
Nutrition should fit the patient. Dogs with diabetes can do well on a complete and balanced diet given at consistent times in appropriate portions, with palatability that supports a consistent intake. High fiber is not required for every diabetic dog, and concurrent disease may change the dietary priority.
The owner should leave knowing what to do on a normal day and when the day does not go to plan.
Need to work through a patient without searching PDFs and open tabs?
Enter the dog's clinical stability, ketone status, and estimated ideal body weight, then select the insulin. The protocol keeps the relevant calculation, equipment, handling, discharge, and monitoring steps together for Vetsulin or Caninsulin, NPH, ProZinc or PZI, glargine U-100, glargine U-300, degludec U-100, and degludec U-200.
Book the first recheck before discharge
The 2026 AAHA guideline recommends glucose monitoring 5 to 14 days after starting insulin or after a dose change. Monitoring is also indicated when hypoglycemia is suspected or when clinical signs return in a previously controlled patient. Use a blood glucose curve or CGM to assess the response. AAHA recommends CGM when starting basal insulin to help determine the dose and administration frequency.
Decide what the team will review
Review the BGC or CGM data alongside clinical signs, body weight, appetite, water intake and urination, insulin administration and handling, diet, treats, exercise, and any suspected hypoglycemic events. The goals are control of polyuria, polydipsia, and polyphagia, maintenance of an appropriate body weight, and avoidance of hypoglycemia. Tight glycemic control is not the primary target in dogs.
Do not increase insulin from one spot glucose result
Spot-checking blood glucose is unreliable for assessing the full response to insulin. Do not use an isolated high result as the sole reason to increase the dose. Use a BGC or CGM to assess the pattern and interpret it with clinical signs and body weight.
If CGM reports a low value in a dog without clinical signs of hypoglycemia, confirm the blood glucose with a veterinary-calibrated portable meter before using that value to guide treatment.
Where the first 14 days usually drift
The calculation is only one part of the starting workflow. Problems often appear in the steps around it.
The dose is calculated before triage
The dog moves into an outpatient insulin plan before systemic illness and ketosis have been assessed. Start with suitability for outpatient care.
Current weight is used automatically
AAHA recommends basing the starting calculation on estimated ideal body weight. That may differ from today's scale weight in an overweight or underweight dog.
The insulin and device are documented separately
The prescription names the insulin, but the concentration or matching syringe or pen is missing. Write them together.
Every insulin gets the same home instructions
Bolus and basal insulins do not share the same relationship with meals. Formulations also differ in handling and device requirements.
The owner receives a dose but no backup plan
Meal refusal, partial eating, vomiting, schedule changes, and possible hypoglycemia need written instructions before discharge.
The recheck has a date but no monitoring plan
Decide what data the team wants to review and what the owner should monitor at home.
One spot glucose drives an increase
A single high glucose value cannot show the full insulin response. Look at the glucose pattern and the dog together.
What the first 14 day plan should include
Before discharge, confirm that the team and owner have:
- A documented outpatient triage decision and ketone assessment.
- The selected insulin, starting dose, route, and interval.
- A starting calculation based on estimated ideal body weight.
- The correct syringe or manufacturer-specified pen.
- Product-specific handling and storage instructions.
- Feeding guidance appropriate to the selected insulin.
- Instructions for reduced appetite, vomiting, and suspected hypoglycemia.
- A clear home monitoring plan.
- BGC or CGM monitoring planned for 5 to 14 days after starting insulin.
- A reminder to interpret glucose results with clinical signs and body weight.
- A reminder not to increase insulin based only on one spot glucose result.
Ready to run the workflow?
For a patient in front of you, the Canine Diabetes Protocol organizes clinical stability, ketone status, estimated ideal body weight, insulin-specific starting and device rules, owner guidance, and monitoring in one place. It does not diagnose DKA, interpret glucose curves, or make later dose adjustments.
References
- Bugbee A, Rucinsky R, Alvarez E, Cook A, Lathan P, Panning C. 2026 AAHA Diabetes Management Guidelines for Dogs. Journal of the American Animal Hospital Association. 2026;63(5). doi:10.5326/JAAHA-MS-7583. Read the AAHA guideline
- AAHA. 2026 AAHA Diabetes Management Guidelines for Dogs: Guidelines at a Glance. View the guideline resource center
Disclaimer
For veterinary professional education and workflow support only. This guide is based on the 2026 AAHA Diabetes Management Guidelines for Dogs, which provide guidance rather than a standard of care or an exclusive treatment protocol. This guide does not diagnose diabetes or DKA and does not replace patient-specific assessment, clinical judgment, hospital triage, current product labeling, local regulations, or current veterinary references. Insulin selection, dosing, monitoring, and later adjustments must be based on the individual patient and the clinician's assessment.