Do Worms Eat Other Worms?

Article published at: Sep 22, 2023 Article author: Ozark Worm Farms, LLC.
Do Worms Eat Other Worms?
All Worm Farming

Worms are essential to the health of our soil. They break down organic matter, which helps to improve soil fertility and drainage. Worms also help to aerate the soil and suppress pests and diseases.

But did you know that worms can also eat other worms? This is known as worm cannibalism. Worm cannibalism is rare, but it can happen, especially when food is scarce or the environment is unhealthy.

What Do Worms Eat?

Worms are detritivores, meaning they eat decaying organic matter. Their diet typically consists of:

  • Organic matter: This includes dead leaves, grass clippings, food scraps, and manure.
  • Decomposing plant and animal material: Worms will eat dead animals, such as insects and worms, as well as decaying plants.
  • Microorganisms: Worms also eat bacteria, fungi, and other microorganisms.

Worms like a diet that consists of many organic materials that you find locally. Many times you can feed worms for free without purchasing expensive materials. Some of our free favorites are cow manure, rabbit manure, and horse manure (especially horse manure).  

You may want to read more about what worms eat to get more in-depth insight.

Do Worms Cannibalize?

Yes, worms can cannibalize, but it is rare. Cannibalism is more likely to occur when food is scarce or the environment is unhealthy.

When food is scarce

If worms do not have enough food to eat, they may start to cannibalize each other. This is especially likely in crowded worm bins.

That's why it's important to keep your worms in a worm bin that is large enough to house them. One of our favorite worm bins is the sub-pod mini, which is great for starting out! Or you can make your own -just follow this guide to make sure you build one big enough for them.

When the environment is unhealthy

If the worm bin is too hot, too cold, too wet, or too dry, worms may become stressed and start to cannibalize each other.

Why Do Worms Cannibalize?

There are a few reasons why worms may cannibalize:

  • To survive: If worms are starving, they may cannibalize each other to survive.
  • To Get Nutrients: Worms may also cannibalize each other to get nutrients. For example, a worm may cannibalize a sick or injured worm to get the nutrients it needs to heal. This falls under more of the category to survive, but it at least gives some instance as to why they will eat each other!
  • To remove sick or injured worms: Worms may also cannibalize each other to remove sick or injured worms from the population. This helps to prevent the spread of disease.

How to Prevent Worm Cannibalism

There are a few things you can do to prevent worm cannibalism:

  • Provide Plenty of Food: Make sure your worm bin has enough food for all of the worms. You can add food scraps, dead leaves, and grass clippings to the bin.
  • Maintain a Healthy Environment: Make sure the worm bin is the right temperature and humidity. It is also important to keep the bin clean.
  • Remove Sick or Injured Worms: If you see any sick or injured worms, remove them from the bin. This will help to prevent the spread of disease and cannibalism.

Now - all this said, don't worry about the difficulty of raising worms. It's actually quite easy! Just like anything, it just takes a little bit of work.

All it takes is getting started.

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