Pet Health

Changes in the colour of your pet’s poo?

Discover what different colours of your pet's poo mean! Learn to identify signs of health issues and when to consult your vet for your furry friend.
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
Dog excrement in various colors on grass, illustrating changes in pet health and diet, with a focus on veterinary advice.

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As a pet owner, you’ve probably noticed that your pet’s poo can sometimes change in color. While it’s not the most glamorous part of pet care, monitoring your pet’s stool is an important way to gauge their overall health. Changes in color can indicate anything from dietary shifts to serious medical issues. So, what does it mean when your pet’s poo looks different?

⚠️ What to Watch For

When it comes to stool color, the spectrum can vary widely, but not all changes are cause for alarm. Here’s what to keep an eye on:

  • Brown: Normal, healthy stool is typically brown, thanks to bile pigments in the digestive system.
  • Black or tarry: This may suggest digested blood, often indicating bleeding in the stomach or small intestine.
  • Red or streaked with blood: Fresh blood can be a sign of bleeding in the lower digestive tract or rectum.
  • Yellow or orange: This could mean liver issues, bile duct problems, or food sensitivities.
  • Green: May be linked to eating grass, certain foods, or even a gastrointestinal infection.
  • White or gray: This might signal a problem with bile production or issues with the pancreas.

Pay attention to any sudden or persistent changes in color, especially if accompanied by other symptoms like diarrhea, vomiting, or lethargy.

🔍 Possible Causes

Changes in stool color can occur for a variety of reasons. Understanding the underlying causes can help you determine whether it’s a minor issue or something that requires immediate attention. Some common causes include:

  • Dietary changes: A new diet, treats, or table scraps can temporarily alter stool color.
  • Food dyes: Colored treats or kibble can sometimes pass through undigested and change the stool’s color.
  • Parasites: Worms or protozoa can affect digestion and stool appearance.
  • Infections: Bacterial or viral infections may lead to inflammation and changes in stool color or consistency.
  • Internal bleeding: Dark, tarry stools may indicate bleeding in the stomach or intestines.
  • Liver or gallbladder issues: Problems with bile production can result in pale or yellowish stools.
  • Pancreatic problems: Insufficient enzyme production may cause greasy, gray, or clay-like stools.

If you’re unsure about the cause, consulting a veterinarian can provide clarity and peace of mind.

✅ What You Can Do at Home

When you notice a change in your pet’s poo color, there are steps you can take to monitor and manage the situation before rushing to the vet:

  • Think about recent changes in your pet’s diet. Have you introduced new food, treats, or table scraps?
  • Observe your pet’s behavior. Are they eating, drinking, and acting normally?
  • Check for additional symptoms like vomiting, diarrhea, or changes in appetite.
  • Ensure they have access to fresh water and maintain their regular feeding schedule.
  • Keep a stool diary. Track the color, consistency, and frequency of their bowel movements to identify any patterns.

Sometimes, small adjustments like switching to a more digestible diet or eliminating certain foods can resolve the issue. However, persistent changes warrant a professional evaluation.

💡 When to Call a Vet

While occasional changes in stool color aren’t always a cause for panic, certain situations require prompt veterinary attention. Contact your vet if you notice:

  • Black, tarry stools or fresh blood in the stool
  • Pale, white, or gray stools persisting for more than a day
  • Bright yellow or orange stools, especially if accompanied by vomiting or lethargy
  • Persistent diarrhea or mucus in the stool
  • Signs of discomfort, pain, or straining during bowel movements
  • Sudden changes in stool color that don’t resolve within 24–48 hours

Early intervention can make a big difference in addressing underlying health issues and preventing complications.

FAQs

Q: Is green poo always a bad sign?
A: Not necessarily. Green stool can result from eating grass or certain foods. However, if it’s accompanied by diarrhea, vomiting, or other symptoms, it’s best to consult your vet.

Q: Can stress cause changes in stool color?
A: Yes, stress can impact your pet’s digestion, sometimes leading to changes in stool color or consistency. Reducing stressors and providing a calm environment may help.

Q: Should I bring a stool sample to the vet?
A: Yes, bringing a fresh stool sample can help your vet diagnose potential issues more accurately. Store it in a clean, sealed container.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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