Dog Constipation: Causes, Symptoms, and What To Do at Home

If your dog is straining to defecate, producing hard dry stools, or hasn't had a bowel movement in more than two days, they may be constipated. While an occasional missed bowel movement isn't always cause for alarm, persistent constipation in dogs can signal an underlying health problem that needs attention. In some cases, what looks like straining to defecate is actually straining to urinate — an important distinction since urinary blockages are life-threatening emergencies.

What Is Dog Constipation?

Constipation means your dog is having difficulty passing stools or isn't passing them at all. Normal dogs typically have one to two bowel movements per day, though this varies based on diet and individual factors. If your dog goes more than 48 hours without a bowel movement, or is repeatedly squatting and straining but producing nothing — or only small amounts of hard pellets — it's time to investigate. The large intestine's job is to absorb water from waste before it's excreted. When transit slows, the colon pulls more and more water out of the stool, making it progressively harder and more painful to pass.

Common Causes of Constipation in Dogs

Dietary Issues

The most common cause of constipation is diet. A food that's too low in fiber slows intestinal motility. Dehydration is another major contributor — when dogs don't drink enough water, the colon pulls more moisture from the stool, producing hard, dry feces. Ingesting non-food items such as grass, hair, bones, clothing, or other foreign objects can cause partial blockages that slow or stop stool passage entirely. A sudden switch to a new food can also temporarily disrupt bowel regularity.

Lifestyle Factors

Lack of exercise is an underappreciated cause of constipation. Physical activity directly stimulates bowel movement and gut motility, which is why sedentary or recovering dogs are more prone to the problem. Some dogs also hold their bowels if their usual potty routine is disrupted — this is common during travel, boarding, after a move, or even changes in household schedule.

Medical Causes

A range of medical conditions can cause or contribute to constipation:

• Enlarged prostate in intact male dogs — the enlarged gland physically narrows the pelvic canal, making defecation difficult
• Pelvic injury or narrowing following a fracture or trauma
• Anal gland problems — impacted or infected anal glands cause pain during defecation, leading dogs to avoid going
• Hypothyroidism — low thyroid hormone slows metabolism and gut motility throughout the body
• Neurological disorders that impair the nerve signals controlling bowel function
• Medications — opioid pain medications, antacids, antihistamines, and some other drugs slow gut motility as a side effect

Obstipation (Severe Constipation)

In severe or long-standing cases, the colon becomes packed with dry, rock-hard feces that the dog cannot pass independently. This is called obstipation and requires veterinary treatment — typically enemas, manual removal under sedation, or a combination of interventions.

When To Worry: Seek Veterinary Care If Your Dog Shows

Contact your veterinarian promptly if you observe:

• No bowel movement for more than 48 to 72 hours
• Straining with obvious pain, crying, or whimpering
• Vomiting alongside the inability to defecate — this combination can indicate a serious bowel obstruction
• Bloated or visibly distended abdomen
• Passing tiny amounts of liquid stool around what appears to be a blockage
• Blood or mucus visible during straining
• Lethargy, loss of appetite, or visible discomfort at rest

What To Do at Home

For mild constipation in an otherwise healthy dog who is acting normally, these supportive steps may help:

1. Increase water intake — add water or low-sodium chicken broth to dry food to promote hydration and softer stools.
2. Add fiber — a teaspoon of plain canned pumpkin (not sweetened pie filling) mixed into food can help stimulate bowel movements. The combination of water content and fiber supports gut transit.
3. Get your dog moving — even a brisk 15 to 20 minute walk can stimulate intestinal motility and prompt a bowel movement.
4. Switch to wet food temporarily — the significantly higher moisture content in canned food supports gut function far better than dry kibble alone.
5. Avoid laxatives or enemas without vet guidance — human products can cause dangerous electrolyte imbalances or intestinal injury in dogs.

Do not attempt home treatment if your dog is vomiting, in obvious pain, or hasn't defecated in more than 48 hours — these signs can indicate a bowel obstruction or other serious condition requiring emergency care.

How Voyage Can Help

Constipation can range from a simple dietary fix to a medical emergency depending on the underlying cause. Voyage's AI vet assistant helps you determine which situation you're dealing with — right now, from your phone. Describe your dog's symptoms and Voyage provides a personalized assessment based on their breed, age, weight, and health history. Get instant answers for $4.99/month, 24/7. No appointment needed.

This article is for informational purposes only and is not a substitute for professional veterinary advice.