There’s a pretty good chance your chihuahua has experienced diarrhea at one time or another. Diarrhea is characterized by the passing of watery or very soft stool and is one of the most common signs of illness reported by chihuahua owners. It’s important for chihuahua owners to understand why chihuahuas have diarrhea and also know how to respond to it. Flatulence often occurs with diarrhea, which may or may not accompany vomiting, loss of appetite, and lethargy.

Why Do Chihuahuas Get Diarrhea?

Diarrhea is common in chihuahuas and may be caused by a variety of things. For example, it may be the result of something as simple as a dietary indiscretion (we all know some chihuahuas who get into the trash or eat table scraps). Or it may be related to something more serious, such as an infectious disease or ingestion of toxins.

Occasional diarrhea is not considered to be normal. If your chihuahua has diarrhea off and on for more than a week or two, you should schedule an appointment with your vet. Bring a stool sample, as checking for intestinal parasites is one of the first steps in diagnosing your chihuahua’s condition. Other diagnostics, such as blood testing or X-rays may be necessary, and your vet may discuss medications, supplements, and dietary changes.

Treatment & Prevention

First, try to get past the “yucky” part of things. Everyone poops. As your chihuahua’s caregiver, you should be able to evaluate its stool so you can discuss it with your vet. Of course, you should always wear gloves or use a plastic bag to handle the stool. Be sure to wash your hands well after handling your chihuahua or its stool.

What to Lookout For

  • Lethargy
  • Vomiting
  • Blood or worms in the stool, or discolored stool
  • Ate something poisonous
  • Gums are discolored

If your chihuahua has diarrhea, try to collect a sample. You might need to take it to the vet later. Take a look at the stool’s consistency and color. Is it watery? Pudding-like? Formed but soft? Is there blood present? Mucus? Is it black and/or tarry? Do you see pieces of toys, clothing, or other inedible material in it? Make a note of this, because your vet will ask.

If lethargy, vomiting, or other signs of illness accompany the vomiting, make a note of this too. If you can’t take the stool sample to the vet right away, store it in the fridge in a sealed bag or container. Many people prefer to double-bag it because it is poop, after all.

One or two episodes of diarrhea are not necessarily reasons to become alarmed. Some cases of diarrhea are self-limiting (meaning they resolve on their own). If your chihuahua is still eating and drinking, that’s a good sign. Never give over-the-counter or prescription medications without your vet’s advice. If you’re that concerned, it’s best to just take your chihuahua to the vet.

Continued diarrhea can lead to dehydration or weight loss and could be a symptom of an underlying illness. It’s important not to ignore symptoms when your chihuahua is sick. chihuahuas often hide their illnesses for as long as possible, acting as if they feel normal when there’s really something more serious going on.

When to Call a Vet ASAP

If any of the following circumstances apply, contact your vet immediately:

  • Episodes of diarrhea are frequently repeated over several hours.
  • Your chihuahua shows extreme lethargy or lack of responsiveness.
  • You suspect your chihuahua has ingested a toxin.
  • You see excessive amounts of blood in the stool (the light spot isn’t necessarily an emergency, but call the vet if it continues).
  • The stool is black and/or has a tarry appearance.
  • Your chihuahua is on medication that may cause diarrhea (stop giving the medication and call your vet).
  • You suspect your chihuahua ingested a foreign body, such as a toy or clothing.
  • Your chihuahua’s gums are pale, white, bluish, or gray in color.
  • Your chihuahua’s abdomen seems painful and/or distended.
  • You see worms in the stool (not an emergency, but a dewormer will be needed).
  • Diarrhea occurs for more than 24 hours.
  • If you’re in doubt, just call the vet.

If your chihuahua has diarrhea one time and otherwise acts completely normal, you can probably continue with its normal routine and feeding. Just keep watching for diarrhea, vomiting, loss of appetite, and signs of illness. Note that chihuahuas with diarrhea may strain to defecate with little or no stool production. This is not necessarily a cause for concern unless it continues for more than a day.

Feeding a Bland Diet

If your chihuahua has diarrhea again at the next bowel movement, try changing to a bland diet temporarily. To prepare a bland diet, boil unseasoned chicken breast with plain white rice OR ground low-fat meat with plain white rice. Drain off any residual fat after cooking. Don’t add salt or seasoning. Feed your chihuahua the bland diet until the next day. If diarrhea begins to improve, your chihuahua has a good appetite, and there’s no vomiting, you can start to gradually add your chihuahua’s normal food to the bland diet mixture. ​Call your vet if diarrhea continues for more than 24 hours.

As you likely know, diarrhea cannot be entirely prevented. Preventive measures related to your chihuahua’s diet are your best bet to guard against diarrhea. Avoid table scraps, human food, and letting your chihuahua eat foreign objects or materials outdoors. All of these can cause digestive issues and generally wreak havoc on a chihuahua’s gastrointestinal system.


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