What causes dogs to have diarrhea? Is it a terminal illness?

Jul 26,2025
5Min

Dogs have diarrhea or parvovirus infection

One of the most common cases is parvovirus infection. Many people should have heard of or even personally experienced that a puppy they just brought home got parvovirus. Case. This is a serious disease that unvaccinated puppies are susceptible to. It is often complicated by coronavirus or even canine distemper. If not treated properly, the mortality rate is quite high.

The main symptoms of parvovirus infection are fever, dehydration, depression, frequent vomiting and thinning. It is a dark brown red color and has a strong odor. The earlier the infection begins, the higher the survival rate. If the puppy that has just returned home has symptoms of vomiting and diarrhea, the doctor should check it as soon as possible.

Dogs have bloody stools or parasites

Blood in the stool caused by intestinal parasites is also a very common cause of blood in the stool. Parasites living in the intestines such as coccidia, roundworms, and whipworms may cause damage to the intestinal wall, rupture of blood vessels, and then cause blood in the dog's stool. Regular deworming can effectively avoid this problem. If you find that your dog has long-term bloody stools and chronic diarrhea, you can take your dog to the hospital for a fecal examination to see if there are parasites and what kind of parasites they are.

Dogs have diarrhea or anal gland abscess or trauma

The blood in the stool does not necessarily come from the gastrointestinal tract. It may also be caused by trauma around the anus or anal gland abscess. of. Dogs whose tails are relatively close to the anus (such as German shepherds) should especially pay attention to this situation, because a drooping tail can easily cause anal gland infection, and if not treated in time, it is likely to develop anal fistula.

Dogs diarrhea or swallowing foreign objects

This is also one of the common causes of bloody stools. Many dogs eat foreign objects such as bottle caps, fishing line, and toys out of curiosity, and some owners like to feed their dogs a few bones while they cook. These things are likely to scratch the dog's intestinal mucosa during digestion, causing ulcers and bloody stools. Sometimes foreign bodies can block the intestines and even induce intussusception, which can only be solved by surgery.

Dogs have diarrhea or hemorrhagic gastroenteritis (HGE)

Hemorrhagic gastroenteritis in dogs is a disease whose cause is still unknown. It occurs in all dog breeds and can occur suddenly. Diarrhea, bloody stools, vomiting and listlessness are the main symptoms. Usually, if no clear cause can be found, infusion therapy often has a more obvious effect.

Dogs have diarrhea or dietary problems

Dogs’ gastrointestinal tract is relatively fragile and can be affected by overeating, sudden changes in food, overly greasy food, rotten food, sudden environmental changes and food Allergies can cause diarrhea and bloody stools in dogs. In this case, you can fast for a day or two and observe the situation. If the blood in the stool improves, you can gradually feed some less irritating food, and then supplement it with Guangweibao probiotics to regulate the gastrointestinal tract.

Dogs have bloody stools or tumors

Tumors or polyps in the rectum and colon may also cause bloody stools. Blood in the stools caused by such tumors is more common in older dogs.

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