Dog Diabetes Mellitus: Management and Quality of Life

Diabetes mellitus in dogs requires lifelong insulin therapy and careful dietary management. With good control, diabetic dogs can enjoy excellent quality of life for many years.

Key Facts

Canine diabetes mellitus affects approximately 1 in 300-500 dogs, with middle-aged to older dogs most at risk
Intact female dogs have significantly higher diabetes risk due to progesterone-driven insulin resistance
Symptoms include polydipsia (excessive drinking), polyuria, weight loss despite good appetite, and cataracts
Dogs require insulin injections twice daily with meals — lifelong compliance is essential for welfare
Diabetic cataracts develop in 75% of diabetic dogs within a year of diagnosis and can be surgically corrected
Hypoglycaemia from insulin overdose is a life-threatening emergency requiring immediate glucose supplementation

Welfare Considerations

Uncontrolled diabetes causes chronic suffering from osmotic dehydration, muscle wasting, and secondary complications. Well-controlled diabetes allows near-normal quality of life, and the twice-daily injection routine, though demanding for owners, is tolerated well by most dogs when handled calmly. The commitment required — consistent mealtimes, twice-daily injections, regular monitoring — is substantial but entirely achievable with veterinary support.

What You Can Do

Establish consistent meal and injection times and maintain them as rigorously as possible
Learn to recognise signs of hypoglycaemia — weakness, trembling, seizures — and keep glucose syrup accessible
Monitor water intake and urine output as indicators of glycaemic control at home
Maintain regular veterinary monitoring including blood and urine glucose assessments
Neuter unspayed female dogs diagnosed with diabetes as soon as they are stable — this may allow diabetes remission
Consider cataract surgery referral once diabetes is well-controlled to restore vision