Signs of Dog Constipation & What to Do

Signs Your Dog Is Constipated

A dog with constipation may strain to pass stool, produce hard and dry feces, or go without a bowel movement for 48 hours or more. Straining alone isn’t always constipation—dogs with colitis may also strain but pass small, mucus- or blood-tinged stools. Pain during defecation, blood, or mucus in the stool are red flags requiring veterinary evaluation. Older dogs and those with reduced activity or fluid intake are more prone to constipation. In severe cases, the dog may stop eating, vomit, or develop a painful abdomen.

Common Causes of Constipation

Constipation often stems from dehydration, which dries out stool in the colon. Dogs may also ingest indigestible materials like bone chips, hair, grass, or cloth, which form hard masses in the colon. Involuntary suppression of the urge to defecate—common during housetraining or when left alone—can also lead to constipation. Medical conditions such as hypothyroidism or an enlarged prostate in male dogs may obstruct the colon. Additionally, long fur around the rectum can trap soft stool, leading to matting and blockage, especially in very furry dogs.

Safe Home Treatments to Try

Increase hydration by adding water to dry food or offering fresh water frequently. For fiber, try one teaspoon of ground flaxseed per cup of food or half a teaspoon of Metamucil per ten pounds of body weight daily. Canned pumpkin (one tablespoon twice daily) is also effective. Encourage daily exercise to stimulate bowel movement. Vaseline (one teaspoon twice daily per ten pounds) is a safe short-term laxative, as is vitamin C at 500 mg twice daily. Always monitor stool consistency—stop any supplement if stools become harder.

When to See a Veterinarian

Contact your vet if your dog hasn’t had a bowel movement in several days, shows signs of pain, or passes blood or mucus. Straining with diarrhea or urinary issues can mimic constipation—confirm the diagnosis. If the dog is severely impacted, sedation may be needed for manual removal. Chronic or severe constipation can lead to mega-colon, a condition requiring lifelong medical management. Never use human enemas—ask your vet for pet-safe options. A vet exam is essential to rule out underlying causes like hypothyroidism or prostate disease.

Prevention and Long-Term Care

Prevent constipation by ensuring constant access to clean water, feeding a balanced diet, and providing regular walks. For older dogs, soaking kibble with water can improve bowel movement. Avoid giving bones or other indigestible items. If your dog is prone to constipation, consider a high-fiber diet or vet-recommended supplements. Monitor stool consistency closely and adjust diet or supplements as needed. Early intervention prevents complications like rectal irritation, infection, or nerve damage.