Yes, it is normal. Guinea pigs eat special soft droppings called cecotropes, which they pick up straight from their bottoms, usually without you noticing. This is how they get nutrients that were not absorbed the first time food passed through.
What Are Cecotropes?
Guinea pigs ferment fiber in a part of the gut called the cecum. The soft, shiny, dark clusters that come out of it are cecotropes. They are rich in B vitamins, protein, and beneficial gut bacteria. Eating them gives the pig a second chance to absorb those nutrients. This habit is called cecotrophy, and rabbits do it too.
Normal round, firm droppings are different. Those are the waste, and pigs leave them alone.
How to Tell the Two Apart
- Regular droppings: Firm, dry, oval pellets left around the cage.
- Cecotropes: Soft, moist, often clustered and strong-smelling. Most are eaten as soon as they appear, often at night or early morning.
When It May Signal a Problem
Seeing your pig eat cecotropes is nothing to worry about. Call an exotics vet if you notice:
- Lots of uneaten cecotropes stuck to the fur or left in the cage. This can point to obesity, dental pain, back pain, or a diet too low in fiber.
- Diarrhea, a swollen belly, or a pig that is not eating or drinking.
- Very small, dry droppings or no droppings at all.
Supporting Healthy Digestion
- Give unlimited grass hay every day. See Hay for Guinea Pigs.
- Offer a measured portion of plain pellets and fresh vegetables, following What Do Guinea Pigs Eat?
- Avoid sugary treats and foods that cause gas or loose stools. Our list of foods that are toxic to guinea pigs is a good place to start.
- Keep the cage clean and dry, but do not try to stop your pig from eating cecotropes.
Bottom Line
Poop eating in guinea pigs is a healthy, necessary habit. Focus on a hay-based diet and watch for changes in appetite or droppings. If anything looks off, contact your vet.
This article is general information, not veterinary advice. Ask your vet if you are concerned about your pet’s health.
