How to Use Mushrooms in Livestock Feed: Benefits, Research, and Practical Guide

Table of Contents

1. Why mushrooms in livestock feed is a topic worth understanding
2. What makes mushrooms nutritionally valuable for animals
3. How mushrooms work in an animal’s body
4. Benefits for poultry (broilers and layers)
5. Benefits for cattle, goats, and sheep (ruminants)
6. Benefits for pigs
7. Benefits in aquaculture (fish and catfish farming)
8. Using spent mushroom substrate as animal feed
9. How to practically add mushrooms to livestock feed
10. What the research says — a plain-language summary
11. Key takeaways
12. FAQ

Introduction

Using mushrooms in livestock feed is one of the most exciting developments in animal nutrition right now. Research published in peer-reviewed journals in 2024 and 2025 confirms what traditional farmers have known for years; mushrooms contain powerful compounds that improve animal health, boost immunity, increase growth rates, and reduce dependence on antibiotics.

This is not a fringe idea. It is backed by studies from universities across three continents, and it is directly relevant to poultry, cattle, pig, and fish farmers looking for natural, cost-effective ways to improve their livestock performance. This guide explains the science in plain language and shows you exactly how to apply it on your farm.

Mushroom Farming in Africa Complete Beginner step-by-step guide

1. Why Mushrooms in Livestock Feed Is a Topic Worth Understanding

Antibiotic resistance is one of the biggest challenges facing livestock farming globally. Antibiotics have been widely used in animal feed for decades; not just to treat disease but to promote growth. This practice has contributed to the rise of antibiotic-resistant pathogens, which is now a serious public health concern.

Governments in Europe, the USA, and increasingly across Africa are restricting the use of antibiotics as growth promoters in animal feed. Farmers need alternatives that keep animals healthy and productive without relying on synthetic drugs.

Mushrooms and specifically the bioactive compounds they contain are one of the most promising natural alternatives. They are available, relatively affordable, and the research supporting their benefits is growing rapidly.

How to formulate livestock feed to minimize cost.

2. What Makes Mushrooms Nutritionally Valuable for Animals

Mushrooms are not just a flavouring or a human food. They contain a range of compounds that have direct, measurable effects on animal health and performance.

Key nutrients and compounds in mushrooms:

Compound	What It Is	Why It Matters for Livestock
Beta-glucans (β-glucans)	A type of polysaccharide (complex carbohydrate) found in the cell walls of mushrooms	Stimulates the immune system, improves disease resistance, and acts as a prebiotic to support gut health
Polyphenols	Natural antioxidant compounds	Reduces oxidative stress in animals, improving overall health and meat quality
Glycoproteins	Protein-sugar compounds	Support immune function and have antimicrobial properties
Terpenoids	Naturally occurring organic compounds	Anti-inflammatory effects; support liver function
B-vitamins	Including B1, B2, B3, B5, B9	Essential for energy metabolism, nerve function, and growth
Selenium	A trace mineral and antioxidant	Supports immune function and reproductive health in livestock
Oligosaccharides	Short-chain carbohydrates	Promote the growth of beneficial gut bacteria, improving digestive health
Chitin	A structural polysaccharide	Acts as a prebiotic, supporting intestinal microflora balance

Mushrooms also contain carbohydrates, which make up approximately 50% to 65% of their dry weight composition, providing a useful energy source when included in feed formulations.

How to determine the metabolisable energy and crude protein content CP% in livestock feed.

3. How Mushrooms Work in an Animal’s Body

Think of it this way: when an animal eats mushroom-based feed supplements, the compounds in the mushrooms act like a team of helpers working in different parts of the body at the same time.

• In the gut, beta-glucans and oligosaccharides feed beneficial bacteria and support a healthy intestinal environment. This means better nutrient absorption and fewer digestive problems.
• In the immune system, beta-glucans signal immune cells to become more active. The animal’s body becomes better at recognising and fighting off infections without needing antibiotic support.
• In the cells, antioxidants from polyphenols and selenium neutralise harmful molecules (called free radicals) that build up during normal metabolic activity. This reduces cell damage and supports overall health and longevity.
• At the whole-animal level, the combined effect is better feed conversion (the animal gets more from the same amount of feed), faster growth, stronger disease resistance, and in laying hens, better egg production.

4. Benefits for Poultry (Broilers and Layers)

Poultry is the most researched livestock category for mushroom feed supplementation, and the results from multiple peer-reviewed studies are consistent.

What the research shows for broilers (meat chickens):

• Mushroom species including Pleurotus ostreatus (oyster mushroom), Agaricus bisporus (button mushroom), and Flammulina velutipes (enoki mushroom) have all demonstrated positive effects on broiler growth and performance in controlled feeding trials.
• Oyster mushroom powder added to broiler feed at 20g per kg of feed increased feed intake and feed efficiency during the starter phase in one published study. Improved feed efficiency means the bird gains more weight per unit of feed consumed; directly reducing production costs.
• Mushroom supplementation has been linked to reduced pathogen load in the intestines of broilers, meaning the birds are less likely to carry harmful bacteria that could affect both flock health and meat safety.
• Studies report improvements in carcass quality and meat quality in mushroom-supplemented broilers, including lower fat content and better texture.

What the research shows for layers (egg-producing hens):

• Mushroom supplements have been associated with improvements in egg production rates, egg shell quality, and egg weight in laying hens.
• The immune-boosting effects of beta-glucans mean laying hens are better able to maintain production performance even under stress or during disease pressure.
• Mushroom stem waste (a by-product of commercial mushroom processing) has been studied as a partial replacement for soybean meal in layer chick nutrition, with positive results on growth performance and gut health.

Important practical note: The inclusion rate matters significantly. Too little and there is no measurable benefit. Too much can affect palatability or feed balance. Current research suggests inclusion rates of 5g to 20g of mushroom powder per kg of feed as a starting range, depending on the mushroom species and the target outcome. Always introduce new feed ingredients gradually.

5. Benefits for Cattle, Goats, and Sheep (Ruminants)

For ruminant animals; cattle, goats, and sheep, mushroom-based feed additives work differently than in poultry because ruminants have a complex multi-chamber stomach that ferments feed before digestion.

Key benefits for ruminants:

• Spent mushroom substrate as a roughage supplement. The material left over after mushrooms are harvested — called spent mushroom substrate or OMSS (oyster mushroom spent substrate) — is rich in nutrients including nitrogen, phosphorus, potassium, beta-glucans, and B-vitamins. It functions as a cost-effective roughage supplement for ruminants, particularly valuable in regions where dry season feed is scarce.
• Improved gut health. Mushroom compounds support a healthy rumen microbial environment, which is essential for ruminant digestion and overall health.
• Reduced need for antibiotics. The immune-supporting compounds in mushrooms can help ruminants manage common respiratory and digestive diseases with less antibiotic intervention.
• Milk production and reproductive performance. Mushroom-based feed additives containing B-vitamins, selenium, and antioxidants have been shown to support milk production in dairy cattle and reproductive performance in breeding animals.

Spent mushroom substrate is particularly practical for African farmers who already grow oyster or button mushrooms; what was previously waste material becomes a useful, free roughage supplement for cattle, goats, or sheep.

6. Benefits for Pigs

Research shows that mushroom-based supplements improve pig body weight gain compared to control groups fed standard diets without mushroom supplementation. The mechanisms are the same as in poultry; improved gut microflora balance, enhanced immune response, and better nutrient absorption.

Pigs fed diets supplemented with mushroom extracts or powders have shown:

• Better average daily weight gain
• Improved feed conversion ratios
• Reduced incidence of gut infections
• Lower mortality rates in piglet-rearing stages

For pig farmers looking to reduce antibiotic use while maintaining growth performance, mushroom supplementation is one of the most evidence-backed natural alternatives currently available.

7. Benefits in Aquaculture (Fish and Catfish Farming)

Mushroom-based feed additives have also been studied in aquaculture, with positive results. Research shows that incorporating mushroom supplements into fish diets increases fish production while reducing feed costs — two outcomes that directly improve profitability for catfish and tilapia farmers.

The beta-glucans in mushrooms stimulate the immune systems of fish in ways similar to their effects in land animals. Fish supplemented with mushroom-based additives show improved disease resistance, particularly to common bacterial infections that affect intensively farmed species.

For catfish farmers in Nigeria and across West Africa, spent oyster mushroom substrate or dried mushroom powder is a locally available, low-cost option worth exploring as a partial feed supplement.

8. Using Spent Mushroom Substrate as Animal Feed

Spent mushroom substrate (SMS) — the material remaining in growing bags or trays after mushrooms have been fully harvested — is one of the most practical and cost-effective ways for small-scale farmers to incorporate mushroom benefits into their livestock feeding programme.

What spent mushroom substrate contains:

• Nitrogen, phosphorus, and potassium — key macronutrients for animal health
• Beta-glucans from residual mycelium
• B-vitamins
• Digestible fibre that supports rumen function in cattle, goats, and sheep
• Extracellular enzymes that aid digestion and nutrient absorption in animals

How to use it:

• Dry the spent substrate thoroughly before using it as feed; fresh or wet substrate can develop mold, which is harmful to animals.
• For ruminants, mix dried spent substrate with other roughage feeds as a supplement; not as a replacement for balanced feed.
• For poultry and pigs, dried spent substrate can be ground and included in feed formulations at low inclusion rates. Seek guidance from an animal nutritionist for exact inclusion percentages based on your target species and production stage.
• Do not use spent substrate that was grown on treated or chemically contaminated materials. Only use substrate from farms that use clean, untreated growing materials.

Practical benefit for farmers who already grow mushrooms: If you farm oyster or button mushrooms, your spent substrate is currently waste. Drying it and using it as a ruminant feed supplement converts that waste into a resource reducing your feed costs and adding value to your mushroom operation at the same time.

9. How to Practically Add Mushrooms to Livestock Feed

You do not need a laboratory or expensive equipment to begin incorporating mushroom benefits into your livestock feeding programme. Here are three practical approaches, from simplest to most sophisticated:

Option 1: Dried spent mushroom substrate (simplest)
Dry your spent oyster or button mushroom substrate thoroughly. Grind or crumble it and mix into roughage feed for cattle, goats, or sheep. This costs almost nothing if you already grow mushrooms.

Option 2: Dried mushroom powder
Dry fresh mushrooms (oyster mushrooms are most accessible in West Africa) in a food dehydrator or solar dryer at 50°C to 60°C until fully dry. Grind into a fine powder. Add to poultry or pig feed at an inclusion rate of 5g to 20g per kg of total feed. Start at the lower end and observe your flock or herd for 2 to 4 weeks before increasing the rate.

Option 3: Commercial mushroom extract or beta-glucan supplement
Commercial mushroom-based livestock feed supplements are becoming more available through veterinary supply companies and agro-input dealers. These are standardised products with known beta-glucan concentrations. They are more expensive than home-produced options but offer consistency and precise dosing. Follow the manufacturer’s inclusion rate guidance carefully.

General rules for introducing mushroom supplements:

• Introduce gradually over 7 to 14 days; sudden diet changes cause digestive stress in all livestock species
• Keep records of feed intake, growth rate, and health observations before and after introduction so you can measure the effect
• If any animal shows unusual symptoms after introduction, reduce or remove the supplement and consult a vet
• Never exceed recommended inclusion rates; more is not always better with feed supplements

10. What the Research Says — A Plain-Language Summary

Here is a summary of what current peer-reviewed research confirms about mushrooms in livestock feed:

Livestock Type	What Research Shows	Mushroom Species Studied
Broiler chickens	Improved feed efficiency, growth rate, immune response, reduced pathogen load, better meat quality	Pleurotus ostreatus, Agaricus bisporus, Flammulina velutipes
Laying hens	Improved egg production, egg quality, immune response	Pleurotus ostreatus, Agaricus bisporus
Pigs	Improved average daily weight gain, feed conversion, reduced gut infections	Various mushroom species and extracts
Cattle, goats, sheep	Improved gut health, roughage nutrition from spent substrate, reduced antibiotic dependence	Spent oyster and button mushroom substrate
Fish (aquaculture)	Increased production, reduced feed costs, improved disease resistance	Various mushroom species

It is important to note that while the research is consistently positive, most studies are conducted at research institutions under controlled conditions. On-farm results may vary depending on overall feed quality, management standards, and the health status of your animals. Mushroom supplements work best as part of a well-managed feeding programme; not as a standalone fix for poor nutrition or disease management.

11. Key Takeaways

• Mushrooms contain beta-glucans, polyphenols, B-vitamins, selenium, and other compounds that directly benefit livestock health and production performance.
• The strongest research evidence is in poultry, where mushroom supplements improve feed efficiency, growth rate, disease resistance, and meat quality.
• Spent mushroom substrate is a free, nutrient-rich roughage supplement for ruminants that most mushroom farmers currently discard as waste.
• Mushroom supplementation is one of the most evidence-backed natural alternatives to antibiotic growth promoters currently available.
• Introduce mushroom supplements gradually — over 7 to 14 days — and keep records so you can measure the effect on your specific flock or herd.
• More is not always better. Follow research-based inclusion rates and observe your animals’ response before adjusting.

Already growing mushrooms? Read our guide on how to add value to your mushrooms and earn more per kilo to see all the ways your mushrooms can generate income beyond fresh sales.

Want to start growing oyster mushrooms to supply both the food and animal feed markets? Read our complete guide to oyster mushroom farming in Africa.

12. FAQ

Can I feed mushrooms directly to my chickens or cattle?

Yes, in most cases. Fresh mushrooms can be fed to poultry and ruminants in small amounts. However, for consistent, measurable benefits, dried mushroom powder or spent substrate provides a more controlled and practical format. Introduce any new feed ingredient gradually and monitor your animals’ response.

Which mushroom species is best for livestock feed?

Oyster mushroom (Pleurotus ostreatus) is the most widely studied and most accessible in West Africa, making it the most practical starting point for most African farmers. Button mushroom (Agaricus bisporus) and Reishi (Ganoderma lucidum) are also well-researched. The best choice depends on what is locally available and affordable.

Is using mushrooms in feed safe for all livestock?

Research to date shows mushroom-based feed supplements to be safe across poultry, pigs, ruminants, and fish when used at appropriate inclusion rates. There are no recorded cases of toxicity in livestock from edible mushroom species used at research-standard inclusion rates. Always use edible, cultivated mushroom species, never wild mushrooms of unknown identity.

Can spent mushroom substrate replace other feeds?

No. Spent mushroom substrate should be used as a supplement to a balanced feed programme; not as a replacement for it. It is a roughage supplement for ruminants and a minor additive for pigs and poultry, not a complete feed source.

Does mushroom supplementation actually reduce antibiotic use?

Research suggests yes, particularly for poultry and pigs. The immune-boosting properties of beta-glucans have been shown to reduce the incidence of common infections that would otherwise require antibiotic treatment. However, mushroom supplements are a preventive support tool, not a treatment for active infections. A sick animal still needs appropriate veterinary care.

Where can I get mushroom powder or spent substrate for livestock feeding in Nigeria?

If you grow oyster or button mushrooms yourself, your spent substrate is already available. For mushroom powder, dry fresh mushrooms using a food dehydrator or solar dryer and grind into powder. Commercial mushroom-based feed supplements are becoming available through veterinary supply companies and agro-input dealers in major Nigerian cities, ask your nearest agro-vet supplier.

Published by Kiki’s Agroplace — Digital Marketing for African Agribusinesses.