Glucose trend

Latest BG
—mg/dL
Velocity
—mg/dL/min
Calibration
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Last updated
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Glucose trend

View recent readings as a table
TimeGlucose (mg/dL)

Understanding canine diabetes

A plain-language starting point — not a substitute for what your vet told you about your own dog. Sources: Merck Veterinary Manual, ACVIM (American College of Veterinary Internal Medicine) consensus statement on canine diabetes, ASPCA Animal Poison Control.

What's actually happening. Most diabetic dogs have insulin-deficiency diabetes — the pancreas has stopped making enough insulin, the hormone that lets glucose move out of the blood and into cells for energy. This is different from the more common human pattern (insulin resistance); it's why dogs almost always need injected insulin rather than pills. Without it, glucose builds up in the blood while the body's cells are effectively starving.
Why the daily routine matters so much. Insulin, food, and exercise all move glucose in the same direction — down. The whole point of a fixed daily routine (same food, same amount, same time, insulin timed the same way every day) is to make that drop predictable. Skip or delay a meal after an insulin dose has already been given, and glucose can fall dangerously low with nothing to counteract it.
Low blood sugar (hypoglycemia) — the more urgent of the two. Watch for weakness, wobbliness or stumbling, unusual disorientation, tremors, or (in a severe episode) seizure or collapse. If you see these signs in a dog on insulin: rub a small amount of Karo syrup or honey directly on the gums and call your vet or emergency vet immediately — this is not a "wait and see" situation.
High blood sugar (hyperglycemia). Usually slower and less immediately dangerous than a hypo, but watch for increased thirst and urination, lethargy, or reduced appetite over hours to days. Vomiting, noticeably faster/deeper breathing, or a sweet or acetone-like breath odor can signal diabetic ketoacidosis (DKA) — a real emergency, not something to monitor at home.
This panel explains the disease in general. It doesn't know your dog's actual history, other conditions, or vet's plan — always defer to your own vet for anything specific to your dog.

Log a glucose reading

No sensor needed — enter a glucometer reading directly. Works exactly like a sensor reading everywhere else (trend chart, hypo-drop alerts).

Log from a photo

Take or upload a photo of a glucometer/CGM display — a local vision model (no cloud, no per-call cost) reads the value and time. Always review before logging; it can misread a digit.

Log a feeding

View recent feedings
TimeNote

Food & diet guidance — reference only

General veterinary nutrition principles for diabetic dogs — never a specific diet plan for your dog. Any diet change should go through your vet, especially since food and insulin interact directly. Sources: WSAVA Global Nutrition Committee guidelines, Merck Veterinary Manual, Cornell Riney Canine Health Center, ASPCA Animal Poison Control.

The one principle that matters most: consistency. Diabetic dogs are typically fed the exact same food, the exact same amount, at the exact same times every day, timed around insulin — because insulin dosing is built around a predictable glucose rise from that meal. A one-off "treat" meal that's larger, richer, or at a different time isn't a small thing here; it can throw off the whole day's curve.
What the diet itself usually looks like. Vets commonly favor moderate-to-high fiber, complex (not simple/sugary) carbohydrates, and controlled fat — fiber and complex carbs slow how fast glucose enters the bloodstream after a meal, and fat is kept in check partly because diabetic dogs run a higher risk of pancreatitis.
Real therapeutic diets vets commonly prescribe (get the specific one from your vet, not from here): Hill's Prescription Diet w/d, Royal Canin Veterinary Diet Glycobalance, and Purina Pro Plan Veterinary Diets DM Dietetic Management are the three most widely used canine diabetic therapeutic lines in the US. They're formulated specifically around the fiber/carb/fat profile above.
Homemade diets: possible, but not a DIY project. A homemade diabetic diet can work well, but it has to be formulated by a board-certified veterinary nutritionist (look for "DACVN") — not assembled from a recipe online. An unbalanced homemade diet is a real, common way a dog's diabetes control quietly falls apart. If you want to go this route, ask your vet for a referral.
Treats. Keep them small, low-glycemic, and worked into the same daily routine rather than given spontaneously — plain green beans and small amounts of cooked lean protein (no seasoning, no sauce) are commonly mentioned as lower-impact options, but confirm any regular treat with your vet since it effectively becomes part of the diet.
Genuinely dangerous foods — for any dog, not just diabetic ones. Xylitol (found in many "sugar-free" products) causes a severe, rapid insulin surge and blood-sugar crash — a serious risk to layer onto a dog whose glucose is already being managed. Also avoid grapes/raisins, onions/garlic/chives/leeks, chocolate, macadamia nuts, and alcohol. If you suspect any of these were eaten, call your vet or an animal poison control line immediately rather than waiting for symptoms.
This panel names real products and general principles; it doesn't calculate portions, calories, or a diet plan for your dog. That number always has to come from your vet, based on your dog's weight, condition, and actual insulin plan.

Submit a calibration point

For the automated sensor bridge — pairs a raw sensor value against a reference glucometer reading to tune the conversion. Not needed for manual logging above.

Alert history

TimeSeverityVelocity (mg/dL/min)

How vets read a glucose curve

Reference only — explains the general method vets use so a curve on the chart above means something to you. Always follow your own vet's actual prescribed plan. (This app can apply the published thresholds below to your dog's actual data — see "Insulin Dose Guidance" below — but it never outputs a suggested dose number; see that panel for exactly what it does and doesn't do.)

The curve itself. A full glucose curve is usually taken every 1–2 hours over 12–24 hours, timed around an insulin dose and meal. From it, a vet reads off three things: the nadir (lowest point of the day — the single most important number), the overall range, and how long the insulin's effect lasts before glucose rises again.
General target band. Most sources put an acceptable range at roughly 100–250 mg/dL for most of the day, with a target nadir around 100–150 mg/dL. A nadir under 100 may call for a lower dose; a nadir under 80 is a hard signal to reduce the dose, regardless of what the rest of the curve looks like.
The trap: a high reading doesn't always mean "raise the dose." If the nadir is already low, the dose can't be safely raised even if other readings that day look high — doing so risks pushing the nadir into dangerous territory. This is exactly the shape of curve seen in Somogyi rebound: a dose that's already too high drives glucose down too far, triggering a hormonal rebound that can spike glucose to 400–800 mg/dL — and that rebound can persist for up to three days. Reacting to the high rebound reading by raising the dose further is the classic mistake this causes, and it can escalate the problem rather than fix it.
Switching frequency, not just dose. If once-daily dosing doesn't hold long enough, vets often move to twice-daily dosing at roughly 25% less per dose than the once-daily amount that gave an acceptable nadir (e.g. 10 IU once daily → 7 IU twice daily) — a frequency change, not a random new number.
Fructosamine is a complement, not a substitute. It reflects average glucose over roughly the prior 2–4 weeks (sources vary on the exact window) and helps flag whether a single curve day was unusually high or low — but it can't reveal a Somogyi rebound or a true nadir the way a real curve can, so it doesn't replace one.
Starting doses are insulin-type-specific and vary by product and dog — there's no single universal number, which is exactly why this stays a reference panel rather than a calculator. General veterinary references: Cornell Riney Canine Health Center, Merck Animal Health's Vetsulin canine dosing & Somogyi effect pages, ADW Diabetes glucose-curve interpretation guide.

Insulin Dose Guidance — Formula Reference

Applies the published thresholds above to this dog's actual recent nadir. It never outputs a suggested dose number. It only ever states one of a small fixed set of signals (reduce indicated / consider / in target / elevated with no standard formula) plus the cited logic behind that signal, reasoned from your vet's actual prescribed dose as the required baseline — the app never originates a dose on its own.

Current prescribed dose (enter your vet's actual prescription)