How to know if dog has diabetes?

You might start noticing your dog drinking way more water than usual—refilling their bowl twice a day instead of once, or even lingering by the faucet. This excessive thirst, paired with more frequent trips outside to pee (or accidents in the house, even if they’re house-trained), is one of the first signs to watch for with diabetes. Dogs can’t tell you they’re feeling off, so these small changes in routine often hold the first clues.

Another red flag is sudden weight loss, even if your dog is eating just as much (or more) than before. Their body can’t use glucose properly when they have diabetes, so it starts burning fat and muscle for energy instead. You might notice their ribs feel more prominent when you pet them, or their waist looks slimmer—changes that are easy to miss at first, especially with fluffier breeds.

Lethargy is common too—your usually energetic pup might skip their evening walk, or lie around all day instead of playing with their favorite toy. They might also seem confused or disoriented at times, like forgetting where their food bowl is. These subtle shifts in behavior aren’t just “old age” (even for senior dogs)—they’re worth checking out, as diabetes can make dogs feel constantly tired.

If you spot any of these signs, schedule a vet visit right away. Most vets will run a blood glucose test and a urine test to confirm diabetes, and early diagnosis makes treatment way more effective. In many areas, providing timely medical care for chronic conditions like diabetes is part of local animal welfare laws—skipping this step not only harms your dog but could also lead to compliance issues.

Managing diabetes often involves daily insulin shots, a controlled diet, and regular exercise—but your vet will tailor a plan to your dog’s needs. For example, if you have a busy schedule, they might recommend a once-daily insulin option that fits better with your routine. It’s also important to avoid giving your dog table scraps, as sugary or high-carb foods can spike their blood sugar and make the condition worse.

Watching for signs of diabetes might feel overwhelming at first, but staying alert helps catch the condition early—when it’s easiest to manage. By knowing what to look for, acting fast to see the vet, and following their treatment plan, you’re keeping your furry friend healthy and by your side for years to come. And remember, your vet is always there to answer questions if you’re unsure about anything.