Dog Constipation: Signs, Causes and Treatment

Has your furry friend been circling the garden, crouching hopefully, and coming back with nothing to show for it? If you've noticed your pup straining without success, you're not alone — constipation in dogs is one of the most common tummy troubles pet parents worry about, and it can be genuinely uncomfortable for your four-legged friend.

The good news is that most cases of dog constipation are mild and clear up quickly with a few simple changes at home. In this post, we'll explore the tell-tale signs of a constipated dog, what causes it, when to worry, and exactly what you can do to help — so by the end, you'll feel confident spotting the problem early and knowing when it's time to speak to your vet.

What is constipation in dogs?

In simple terms, canine constipation is the difficulty or inability to pass stool regularly and comfortably. When your dog's digestive system is working normally, waste moves through the intestines and colon, water is absorbed, and a soft, formed poo is passed. Constipation happens when that process slows down.

Inside your dog's digestive tract, gentle muscular contractions called peristalsis (or peristaltic waves) push food and waste along the gastrointestinal tract. When intestinal motility slows, or the stool sits in the colon too long, too much water is absorbed and you're left with hard dry stools that are difficult to pass. The result is a poo that's hard, dry stool — small, firm and stubborn, and often hard and dry to the point of being painful.

There's a range of severity here. Many dogs experience only occasional constipation that resolves in a day. Others develop chronic constipation that keeps returning. In severe cases, a dog can develop obstipation — a complete inability to pass faeces — or even megacolon, where the colon becomes so stretched and weak that it can no longer move waste at all.

Good to know

Signs of constipation in dogs

Because our dogs can't tell us when something's wrong, it helps to know the signs of constipation in dogs so you can act early. Many pet owners first notice something's off during a walk or in the garden.

You may see your dog squat frequently, only to give up. Some dogs circle excessively before trying, while others scoot along the ground because of the discomfort. These are all classic dog constipation symptoms.

Symptoms of constipation in dogs: the finer details

Beyond the obvious straining, there are subtler symptoms of constipation worth knowing. Pay attention to how your dog moves and behaves, not just what lands (or doesn't) on the grass.

• Painful defecation: crying, yelping, whining or even a warning growl when trying to poo can signal pain associated with passing faeces.
• Difficult defecation (dyschezia): your dog adopts a hunched posture and shows real effort with little result.
• Abdominal signs: abdominal pain, a painful abdomen, abdominal bloating or abdominal discomfort when you gently touch the belly.
• General malaise: lethargy, a lack of appetite or decreased appetite, and in prolonged cases, vomiting.
• Stool changes: passing blood, bloody stool, passing mucus, or blood or mucus in the stool.

You might also spot matted hair around the anus, which can trap faeces and make passing faeces even harder. A sudden lack of appetite alongside these signs is a red flag. If you notice these more serious symptoms of constipation in dogs alongside vomiting or a very painful abdomen, it's time to contact your veterinarian.

Causes of constipation in dogs

Understanding the causes of constipation helps you prevent it. There's a long list of possible causes of constipation in dogs, from everyday diet slip-ups to underlying medical conditions. Here are the most common causes of dog constipation.

Diet and hydration

A poor diet is one of the biggest culprits. Not enough fibre in their diet, or a sudden change in diet, can throw off your dog's bowel movements. An adult dog — or even a puppy — that isn't getting enough fibre in his diet may struggle to pass a comfortable bowel movement. Dogs on a very dry food regime who don't drink enough are also prone to dehydration, which leads to hard and dry stools. Getting the balance of soluble fibre and insoluble fibre right in a healthy diet keeps things moving.

Swallowing things they shouldn't

Dogs are curious creatures. Eating bones, swallowing objects, or having ingested pieces of toys and gravel can all create a blockage in the intestinal tract. A true foreign object or foreign body can cause an intestinal obstruction — a serious bowel obstruction that needs urgent care. These kinds of digestive issues can quickly turn from a minor bother into an emergency.

Puppy constipation and grooming problems

Puppy constipation is often down to insufficient fibre, dehydration or swallowing something they shouldn't while exploring the world. In dogs of any age, excessive self-grooming can cause hair to collect in the stool, forming firm plugs. Blocked or abscessed anal sacs (also called anal glands) and other anal gland problems make defecation painful, so dogs hold it in. In male dogs, an enlarged prostate gland or prostate disease can press on the rectum and cause difficult defecation.

Medical and physical causes

• Orthopaedic issues: arthritis or another orthopaedic issue can make squatting painful.
• Neurological causes: a neurological disorder, nervous system disorders or spinal cord disease can affect the nerves that control the bowel.
• Trauma: pelvis trauma, trauma to the pelvis or a broken pelvis can narrow the passage.
• Whole-body illness: hypothyroidism, kidney disease or a kidney problem, and imbalanced electrolytes can all play a part.
• Lifestyle: obesity, a sedentary lifestyle and a lack of exercise slow the gut.
• Other: tumours, masses or tumours near the colon, perineal fistulas, intussusception, stress or anxiety, and even a medication side effect (a common side effect of medication or after anaesthesia).

Older dogs and senior dogs are especially prone, as aging naturally slows the digestive system. Brachycephalic flat-faced dogs and elderly dogs may also struggle more. Whatever the trigger, identifying the underlying cause is the key to lasting relief.

How can I tell if my dog is constipated?

The simplest test is time and observation. Keep an eye on the litter of clues: is your dog straining to poo without producing anything? Are the stools hard, dry stool or pebble-like? Has it been 24 hours or longer since they last managed to pass a normal stool?

Knowing your dog's normal feeding routine and bowel movements makes this much easier. If you're ever unsure what "normal" looks like, our guide on how often your dog should poop is a handy reference. It's also worth learning to read your dog's body language, since a hunched posture or reluctance to move often speaks louder than words.

When to worry about constipation in dogs

Most mild constipation clears within a day or two. But some situations are a genuine veterinary medical emergency and shouldn't wait.

Don't ignore this

Use these quick verdicts as a rough guide: ✓ Went within 24 hours, back to normal ⚠ No poo for two or more days ＋ 48 hours plus vomiting — call the vet

Don't confuse constipation with a urinary tract issue — a dog straining to wee looks similar. And remember that diarrhoea after a bout of constipation isn't always reassuring; sometimes liquid stool sneaks past a firm blockage. When in doubt, speak to your vet.

How is constipation in dogs diagnosed?

When you call the vet, they'll want your dog's medical history and details of the symptoms. At the clinic, diagnosis usually involves a physical exam and a few checks to find the underlying cause.

1. Physical exam and history

   The vet reviews recent diet, medications and behaviour, then performs a hands-on assessment.

2. Abdominal palpation and rectal examination

   Gently feeling the belly (abdominal palpation) and a rectal examination help locate hard stool, masses or a foreign body.

3. Imaging and bloods

   X-rays reveal blockages, an intestinal obstruction or an enlarged prostate, while blood tests rule out kidney disease, hypothyroidism and other underlying conditions.

How is constipation in dogs treated?

The right dog constipation treatment depends entirely on the cause and severity. For mild constipation, simple home measures often do the trick. For severe constipation or obstipation, your vet may need to step in.

Common treatment options range from a gentle stool softener or laxative prescribed by your vet, to an enema for a stubborn, impacted colon, right through to surgery if a foreign object is causing an obstruction. Never give a human laxative without veterinary advice — the wrong constipation treatment can do more harm than good.

Food selection for constipated dogs

Diet is central to recovery. Adding wet food alongside dry food boosts moisture, and increasing dietary fibre gently bulks and softens the stool. In recurring cases, your vet may recommend a prescription diet high in fibre or a specific high-fibre diet. If you're rethinking meals altogether, our guide to feeding at different life stages is a useful starting point for a balanced diet.

Dog constipation home remedies

For an otherwise healthy, bright dog with mild symptoms, a few home remedies for dog constipation can work wonders. Always check with your vet first if you're unsure.

These natural laxatives are gentle, but they're for occasional constipation only. If nothing improves within two days, or symptoms worsen, stop the home remedies and call the vet.

What can I give my dog for constipation?

The safest first-line answer is fibre and hydration. A little canned pumpkin, more fibre in their diet, and plenty of fresh water often resolve mild cases. Beyond that, only give a laxative or stool softener that your vet has specifically recommended for your dog. What works as a home remedy for one dog can be risky for another with an undiagnosed underlying condition, so when in doubt, speak to your vet.

Complications of untreated constipation

Left alone, prolonged constipation can snowball. Waste that sits too long becomes ever harder to shift, leading to obstipation and, over time, megacolon — a permanently stretched colon that struggles to contract. You may also see weight loss, ongoing lethargy and repeated vomiting as the digestive tract backs up. This is exactly why early action matters and why a lingering problem warrants a trip to the vet.

How can I help my constipated dog?

Beyond food, your everyday routine makes a real difference to your dog's digestive health.

1. Keep them moving

   Regular exercise and daily walks stimulate intestinal motility. Frequent walks give plenty of chances to go, too. See our guide on how often to walk your dog.

2. Prioritise water

   Dehydration is a top cause. Encourage drinking and check out how much water your dog should drink daily.

3. Watch the diet

   Feed a consistent, balanced diet with the right fibre, and avoid feeding bones, which are a classic cause of a blockage.

Can I prevent constipation in my dog?

Happily, you can do a lot to prevent constipation. A healthy diet with adequate fibre, constant fresh water, a healthy weight and regular exercise keep the digestive system running smoothly. Steer clear of a sudden change in diet, discourage swallowing objects or gravel on walks, and keep senior pets moving with gentle, regular walks. A stable feeding routine supports good gut function and steady bowel movements for life.

When to call your vet

To keep it simple, contact your veterinarian if your dog hasn't pooed for 48 hours, is straining painfully, shows a painful abdomen, is passing blood or mucus, or is off their food and lethargic. A sudden loss of appetite, weakness or ongoing digestive issues all point to a possible obstruction or an underlying cause that needs proper investigation. It's always better to phone for advice early than to wait — your vet would far rather hear from a cautious dog owner than treat a dog in crisis.

Quick questions

Sources & further reading

• Tuff Pets — How often should my dog poop?
• Tuff Pets — How much water should my dog drink?
• Tuff Pets — Why is my dog pooping in the house?