Dog Diabetes Series 1: Understanding Diabetes in Dogs—Causes, Risks, and Signs

By Dr. Ryan Chuang

Unlike cats, most dogs suffer from Type I Diabetes, meaning their pancreas has lost the ability to produce insulin. This usually requires lifelong insulin therapy. Understanding why it happens and recognizing the early signs is crucial for every dog owner.

1. What Causes Diabetes in Dogs?

The underlying causes in dogs differ from other species and include:

• Autoimmune Factors: In many cases, the immune system mistakenly attacks and destroys the insulin-producing cells in the pancreas.

• Pancreatitis: Approximately 30% of diabetic dogs develop the condition following pancreatitis. High-fat diets, obesity, and high cholesterol are major triggers for pancreatic damage.

• Breed Predisposition: Genetics play a large role. In my clinical experience in Hong Kong, Miniature Poodles are the most affected breed (75-85% of my cases), followed by Schnauzers.

• Hormonal Influence (Unspayed Females): Hormones in intact females can cause significant blood sugar spikes. Spaying is often mandatory to stabilize a diabetic female dog.

• Cushing’s Disease: Excessive adrenal hormones can interfere with insulin, making diabetic management much more complex.

2. Recognizing the Symptoms

Look out for these classic warning signs:

• PU/PD (Increased Thirst & Urination): Drinking and urinating much more than usual.

• Ravenous Hunger with Weight Loss: Eating heartily but losing weight because the body cannot process the energy.

• Cataracts: A very common complication in dogs. The eyes can turn cloudy or white in a short period, leading to vision loss or secondary glaucoma.

• Abdominal Pain or gastrointestinal symptoms: If pancreatitis is also present, the dog may show signs of digestive distress or lethargy.

3. Diagnosis

Diagnosing diabetes in dogs is generally more straightforward than in cats because dogs do not experience significant "stress-induced hyperglycemia." If a dog has persistently high blood sugar and glucose in their urine, a diagnosis is typically confirmed.

Early intervention and consistent insulin management are key to preventing complications and ensuring your dog lives a long, happy life.

(Article by Dr. Ryan Chuang. Reproduction without permission is prohibited; sharing with original attribution is welcomed.)

Appointments & Inquiries

For any medical needs or assistance, please contact Paws and Tails Veterinary Hospital:

• Phone: 2832 2836

• WhatsApp: 9870 5711

• Website: www.pawsandtailshk.com

• Address: 4 Po Yan Street, Sheung Wan, Hong Kong