TL;DR: Straining to poop is usually a medium urgency issue caused by constipation or inflammation, but it becomes a high-priority emergency if accompanied by vomiting or lethargy. Veterinary intervention is required if the straining persists for more than 24 hours.
What does it mean if my dog is straining to poop?
Straining to defecate, medically known as tenesmus, occurs when a dog feels a frequent or continuous urge to empty their bowels, even if little to nothing is produced. This sensation can be caused by various issues ranging from simple constipation or dietary indiscretion to more complex problems like colitis, anal gland inflammation, or even a gastrointestinal obstruction.
When is straining to defecate considered a veterinary emergency?
- The urgency level is typically Medium, as the behavior is uncomfortable but rarely an immediate life-threat if the dog is otherwise acting normally.
- Urgency increases to High if your dog is also vomiting, has a distended abdomen, or is lethargic, as these can be signs of a life-threatening intestinal blockage.
- If the straining persists for more than 24 hours, a veterinary exam is necessary to prevent further complications.
How can taking a photo of my dog help with the triage process?
- Taking a clear photo of your dog’s rear area, discharge, or stool allows a veterinary professional to assess the severity of inflammation.
- Photos help identify the presence of blood or mucus, which helps determine how quickly your pet needs to be seen.
- Visual evidence assists the triage team in deciding what diagnostic tests may be required upon your arrival.
Clinical Context (Merck Veterinary Manual)
Straining to defecate (tenesmus) in dogs can be caused by a variety of factors including foreign material, pain, masses, or perineal hernia. Intraluminal or extraluminal constriction due to neoplasia, enlarged prostate, scar tissue (after perianal fistula or anal sac abscess), or anorectal stricture can also predispose to tenesmus. Rectal polyps, which may be palpable per rectum and bleed easily, can cause tenesmus and hematochezia. Rectal prolapse, involving one or more layers of the rectum protruding through the anus due to persistent tenesmus associated with intestinal, anorectal, or urogenital disease, is also a potential cause, particularly in young animals with severe diarrhea and tenesmus. Diagnostic evaluation may include abdominal radiographs, barium enema, ultrasonography, or colonoscopy to identify obstructive lesions, as well as a complete blood count, biochemical profile, urinalysis, and detailed neurologic examination, especially in chronic or recurring cases.
Chapter: Gastroenterology
Source: The Merck Veterinary Manual, 11th Edition (Page 381)