Treating Constipation in Dogs

Dogs occasionally become constipated. Constipation is when it becomes difficult for the dog to have a bowel movement, or when bowel movements become infrequent or stop altogether. can happen at any age. It's not as common as diarrhea - something most pet owners have had to deal with - but it's also not uncommon, and thankfully usually not a serious issue. That said, constipation should be dealt with quickly to ensure it doesn't cause long-term health problems. Pets may also need be checked out to ensure there isn't a more serious underlying cause.

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Symptoms of Constipation in Dogs

Signs of constipation can include the following:

  • Straining to defecate;
  • Passing small, hard stools (the dog might have been straining for some time);
  • The presence of blood or mucous in the stool;
  • Whimpering, whining, crying, or groaning while attempting to defecate;
  • Infrequent or complete absence of a bowel movement.

Causes of Constipation in Dogs


Constipation can often be caused by simply being dehydrated. Dogs need to drink an adequate amount of water for their size, activity level, health conditions, and even weather conditions (for example, all dogs will need to drink more water on hot days). Fortunately, in healthy pets, dehydration is usually easily rectified.

Constipation Due to Medication or Surgery

Sometimes surgery, or the medications given prior, during, or after surgery, can cause pets to become constipated for several days. After-care instructions after a pet is discharged from surgery, or medication information sheets, will typically mention the possibility of constipation if it could be an issue.


Dogs like to sample things, and that can include things that they really shouldn't be eating - like socks, rocks, shoes, or clothing. These foreign objects can get lodged in the intestines and make it hard (or impossible) for dogs to pass a bowel movement.

Matted fur around the anus can also prevent pets from passing a bowel movement.

Age-Related Constipation

The intestinal tract in aging pets can lose muscle tone and make constipation more likely. In addition, many senior dogs have a decreased activity level - exercise is one of those things that helps to keep things "moving along" inside.

Illness or Injury

Some medical conditions, such as arthritis, can make it harder or more painful for pets to position themselves properly in order to defecate. Other health issues that can make constipation more likely include neurological issues, tumors inside the anus or rectum, an enlarged prostate gland, hernias, anal gland problems, and injuries to the pelvis.

Diet Factors That Can Contribute to Constipation

Dehydration is commonly the cause of constipation in dogs. It isn't just that dogs aren't drinking enough from the water bowl, although that can happen; it could also be that the dog's regular diet has very little moisture content, such as dogs that are primarily fed kibble.

Dogs Fed a Raw Diet

Raw-fed dogs can sometimes develop an impacted bowel from the bone fragments that aren't fully-digested and which accumulate in the intestinal tract. One way to reduce this risk is to finely-grind the bones and mix them with the other parts of the meal (ie. meat and/or organs) prior to feeding them.


The stress of a change in routine, surroundings, new people or pets, or anything else out of the ordinary can cause some pets to become constipated.

How to Help a Dog With Constipation

When to Consult a Veterinarian

Pet owners should monitor their dog's bathroom habits to ensure that they're staying 'regular'. Prolonged, untreated, or recurring constipation can lead to the dog becoming unable to empty its colon on his own. Constipation should be resolved fairly quickly. The following are causes for worry, and should result in a call to your vet:

  • Constipation lasts longer than a day or two;
  • Your pet is continually straining and/or appears in pain or distress;
  • Constipation is also accompanied by vomiting;
  • Your pet is also lethargic, experiences loss of appetite, and/or loses weight;
  • Your dog has frequent bouts of constipation;
  • Your dog has additional health issues.

Be sure to consult with your vet prior to giving your dog any supplements or medications, particularly if your dog has other medical conditions, is elderly, very young, or pregnant.

Home Remedies - Adding Fiber

Adding fiber to your dog's diet can sometimes be the simplest way of resolving constipation, as well as helping to prevent it from happening again. Here are a few easy ways to add fiber to your dog's diet on a regular basis. Note, don't do them all at once or you might end up with a different type of bowel issue!

  • Add pure, pureed pumpkin to your dog's diet (note: this is NOT the same as pumpkin pie filling! You only want 100% pure pumpkin). Many dogs love the taste of pumpkin so it's easy to give. Add a dollop on top of your pet's food, once or twice daily. A good place to start is 1 teaspoon per 10 lbs of body weight (eg. a 50-lb dog would get 5 tsp, or just over 1.5 tbsp). You can also grate fresh, peeled pumpkin if you prefer.

  • Add fiber by giving pure, psyllium husk powder to your dog (make sure there's nothing else added, just the psyllium husk). Use about 1/2 to 1 teaspoon per 10 lbs of body weight. Mixing it into a bit of canned food can help make it more palatable for dogs who don't like the texture.

  • Lightly steam and grind up (or puree) green, leafy veggies and add them to your dog's meals. Aim for about 1 teaspoonfor 10 lbs of body weight. Be sure to grind up the veggies to make it easier for your dog to digest.

Add Fluids

Some pets get constipated for the simple reason that they're not getting enough water. Some medical conditions can make it necessary for dogs to drink more; active pets need more water than couch-potatoes; and every pet needs more water on hot days.

Make sure that there is always a bowl of fresh, clean, cool water available any time they want to drink. Dogs who don't drink enough can be encouraged by using a drinking fountain since many pets enjoy drinking from moving water. Pets who drink a lot may empty the water bowl before you can refill it; in these cases, a pet waterer is a handy tool to keep the water flowing. If your pet is elderly, stiff, or has arthritis, elevating their water dish can make it easier for them to drink (note: this is NOT a good option for dogs who are prone to bloat - talk to your vet).

Another thing you can do is to switched to canned food for a few days, or feed a higher proportion of canned food if your dog normally eats kibble. Canned food contains a lot of water and can help get the bowels moving.


Regular exercise is another important factor in keeping the bowels moving. Take your dog for a brisk walk a couple of times a day if you can. Older dogs who aren't particularly mobile can still go for short, gentle walks, ideally a few times a day (a mobility harness is useful for dogs who need some extra help, including pets recovering from surgery or injury). Check with your vet if your dog has any medical conditions that could affect his ability to exercise.


Adding a supplement for maintenance can help maintain a healthy gastro-intestional tract and hopefully prevent (or minimize) constipation. For example, probiotics are often given to pets on a daily basis. Many people like to add a vitamin and mineral supplement to help keep their pets healthy, since healthy pets are less likely to develop other issues.

For pets who need a little extra help, a product called Lax'aire is also popular. It's a gentle laxative and can be given to both dogs and cats.


There may be times when other measures aren't helping to resolve your dog's constipation. In such cases, your veterinarian can prescribe appropriate medications to resolve the issue as well as check your pet to ensure that there isn't a more serious underlying condition that is causing the issue.